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1628985 = 35131829
BaseRepresentation
bin110001101101100111001
310001202112210
412031230321
5404111420
654525333
716563141
oct6155471
93052483
101628985
11a12976
12666849
134505c7
14305921
152229e0
hex18db39

1628985 has 16 divisors (see below), whose sum is σ = 2629440. Its totient is φ = 861120.

The previous prime is 1628983. The next prime is 1628987. The reversal of 1628985 is 5898261.

It is an interprime number because it is at equal distance from previous prime (1628983) and next prime (1628987).

It is not a de Polignac number, because 1628985 - 21 = 1628983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1551 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (164340).

21628985 is an apocalyptic number.

1628985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1628985 is a deficient number, since it is larger than the sum of its proper divisors (1000455).

1628985 is a wasteful number, since it uses less digits than its factorization.

1628985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968.

The product of its digits is 34560, while the sum is 39.

The square root of 1628985 is about 1276.3169669012. The cubic root of 1628985 is about 117.6627592037.

The spelling of 1628985 in words is "one million, six hundred twenty-eight thousand, nine hundred eighty-five".

Divisors: 1 3 5 15 131 393 655 829 1965 2487 4145 12435 108599 325797 542995 1628985