45685731 has 32 divisors (see below), whose sum is σ = 76059648. Its totient is φ = 23748480.

The previous prime is 45685721. The next prime is 45685733. The reversal of 45685731 is 13758654.

It is not a de Polignac number, because 45685731 - 2⁵ = 45685699 is a prime.

It is a super-2 number, since 2×45685731² = 4174372034008722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 45685731.

It is not an unprimeable number, because it can be changed into a prime (45685733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18205 + ... + 20561.

It is an arithmetic number, because the mean of its divisors is an integer number (2376864).

Almost surely, 2^45685731 is an apocalyptic number.

45685731 is a deficient number, since it is larger than the sum of its proper divisors (30373917).

45685731 is a wasteful number, since it uses less digits than its factorization.

45685731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451.

The product of its digits is 100800, while the sum is 39.

The square root of 45685731 is about 6759.1220583741. The cubic root of 45685731 is about 357.4869501488.

The spelling of 45685731 in words is "forty-five million, six hundred eighty-five thousand, seven hundred thirty-one".