40072864 has 24 divisors (see below), whose sum is σ = 84963060. Its totient is φ = 18494976.

The previous prime is 40072853. The next prime is 40072883. The reversal of 40072864 is 46827004.

It can be written as a sum of positive squares in 2 ways, for example, as 37210000 + 2862864 = 6100^2 + 1692^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47749 + ... + 48580.

Almost surely, 2^40072864 is an apocalyptic number.

It is an amenable number.

40072864 is an abundant number, since it is smaller than the sum of its proper divisors (44890196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40072864 is a wasteful number, since it uses less digits than its factorization.

40072864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96352 (or 96344 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 40072864 is about 6330.3131044207. The cubic root of 40072864 is about 342.2027228509.

Adding to 40072864 its reverse (46827004), we get a palindrome (86899868).

The spelling of 40072864 in words is "forty million, seventy-two thousand, eight hundred sixty-four".