40709631 has 16 divisors (see below), whose sum is σ = 55576800. Its totient is φ = 26497920.

The previous prime is 40709623. The next prime is 40709633. The reversal of 40709631 is 13690704.

It is a happy number.

It is not a de Polignac number, because 40709631 - 2³ = 40709623 is a prime.

It is a super-2 number, since 2×40709631² = 3314548112312322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40709633) 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, 26521 + ... + 28013.

It is an arithmetic number, because the mean of its divisors is an integer number (3473550).

Almost surely, 2^40709631 is an apocalyptic number.

40709631 is a deficient number, since it is larger than the sum of its proper divisors (14867169).

40709631 is a wasteful number, since it uses less digits than its factorization.

40709631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 40709631 is about 6380.4099398079. The cubic root of 40709631 is about 344.0057659706.

The spelling of 40709631 in words is "forty million, seven hundred nine thousand, six hundred thirty-one".