40307631 has 16 divisors (see below), whose sum is σ = 66146304. Its totient is φ = 21261024.

The previous prime is 40307627. The next prime is 40307639. The reversal of 40307631 is 13670304.

It is not a de Polignac number, because 40307631 - 2² = 40307627 is a prime.

It is a super-2 number, since 2×40307631² = 3249410233664322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40307639) 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, 73551 + ... + 74096.

It is an arithmetic number, because the mean of its divisors is an integer number (4134144).

Almost surely, 2^40307631 is an apocalyptic number.

40307631 is a deficient number, since it is larger than the sum of its proper divisors (25838673).

40307631 is a wasteful number, since it uses less digits than its factorization.

40307631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147670.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 40307631 is about 6348.8291046460. The cubic root of 40307631 is about 342.8696873138.

Adding to 40307631 its reverse (13670304), we get a palindrome (53977935).

The spelling of 40307631 in words is "forty million, three hundred seven thousand, six hundred thirty-one".