40972431 has 16 divisors (see below), whose sum is σ = 59409504. Its totient is φ = 25012224.

The previous prime is 40972429. The next prime is 40972441. The reversal of 40972431 is 13427904.

It is a happy number.

It is not a de Polignac number, because 40972431 - 2¹ = 40972429 is a prime.

It is a super-2 number, since 2×40972431² = 3357480204099522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40972411) 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, 8970 + ... + 12743.

It is an arithmetic number, because the mean of its divisors is an integer number (3713094).

Almost surely, 2^40972431 is an apocalyptic number.

40972431 is a deficient number, since it is larger than the sum of its proper divisors (18437073).

40972431 is a wasteful number, since it uses less digits than its factorization.

40972431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21770.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 40972431 is about 6400.9710982006. The cubic root of 40972431 is about 344.7444189842.

The spelling of 40972431 in words is "forty million, nine hundred seventy-two thousand, four hundred thirty-one".