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2731988 = 22797571
BaseRepresentation
bin1010011010111111010100
312010210120202
422122333110
51144410423
6134320032
732135660
oct12327724
95123522
102731988
1115a6646
12ab9018
1374867c
145118a0
1538e728
hex29afd4

2731988 has 12 divisors (see below), whose sum is σ = 5464032. Its totient is φ = 1170840.

The previous prime is 2731987. The next prime is 2731997. The reversal of 2731988 is 8891372.

2731988 is an admirable number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48758 + ... + 48813.

It is an arithmetic number, because the mean of its divisors is an integer number (455336).

22731988 is an apocalyptic number.

2731988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2731988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2731988 is a wasteful number, since it uses less digits than its factorization.

2731988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97582 (or 97580 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 2731988 is about 1652.8726508718. The cubic root of 2731988 is about 139.7954154683.

The spelling of 2731988 in words is "two million, seven hundred thirty-one thousand, nine hundred eighty-eight".

Divisors: 1 2 4 7 14 28 97571 195142 390284 682997 1365994 2731988