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1520326380 = 223525338773
BaseRepresentation
bin101101010011110…
…0101011011101100
310220221202120201110
41122213211123230
511103200421010
6410505512020
752450363266
oct13247453354
93827676643
101520326380
11710203791
123651a2610
131b2c8b111
14105cb4b36
158d712120
hex5a9e56ec

1520326380 has 24 divisors (see below), whose sum is σ = 4256914032. Its totient is φ = 405420352.

The previous prime is 1520326373. The next prime is 1520326387. The reversal of 1520326380 is 836230251.

It is an interprime number because it is at equal distance from previous prime (1520326373) and next prime (1520326387).

It is a super-2 number, since 2×15203263802 = 4622784603447808800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1520326387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12669327 + ... + 12669446.

It is an arithmetic number, because the mean of its divisors is an integer number (177371418).

Almost surely, 21520326380 is an apocalyptic number.

1520326380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520326380 is an abundant number, since it is smaller than the sum of its proper divisors (2736587652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1520326380 is a wasteful number, since it uses less digits than its factorization.

1520326380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25338785 (or 25338783 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1520326380 is about 38991.3628897478. The cubic root of 1520326380 is about 1149.8617048568.

The spelling of 1520326380 in words is "one billion, five hundred twenty million, three hundred twenty-six thousand, three hundred eighty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 25338773 50677546 76016319 101355092 126693865 152032638 253387730 304065276 380081595 506775460 760163190 1520326380