40038688 has 24 divisors (see below), whose sum is σ = 79128252. Its totient is φ = 19942656.

The previous prime is 40038679. The next prime is 40038721. The reversal of 40038688 is 88683004.

It can be written as a sum of positive squares in 2 ways, for example, as 29463184 + 10575504 = 5428^2 + 3252^2 .

It is a super-2 number, since 2×40038688² = 3206193073522688, which contains 22 as substring.

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, 6606 + ... + 11122.

Almost surely, 2^40038688 is an apocalyptic number.

It is an amenable number.

40038688 is a deficient number, since it is larger than the sum of its proper divisors (39089564).

40038688 is a wasteful number, since it uses less digits than its factorization.

40038688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4804 (or 4796 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 40038688 is about 6327.6131360885. The cubic root of 40038688 is about 342.1054130559.

Subtracting 40038688 from its reverse (88683004), we obtain a triangular number (48644316 = T₉₈₆₃).

The spelling of 40038688 in words is "forty million, thirty-eight thousand, six hundred eighty-eight".