40402631 has 8 divisors (see below), whose sum is σ = 41582640. Its totient is φ = 39227328.

The previous prime is 40402619. The next prime is 40402633. The reversal of 40402631 is 13620404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40402631 is a prime.

It is a super-2 number, since 2×40402631² = 3264745183444322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402633) 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, 23555 + ... + 25211.

It is an arithmetic number, because the mean of its divisors is an integer number (5197830).

Almost surely, 2^40402631 is an apocalyptic number.

40402631 is a deficient number, since it is larger than the sum of its proper divisors (1180009).

40402631 is a wasteful number, since it uses less digits than its factorization.

40402631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 40402631 is about 6356.3063960133. The cubic root of 40402631 is about 343.1388428318.

The spelling of 40402631 in words is "forty million, four hundred two thousand, six hundred thirty-one".