40386688 has 16 divisors (see below), whose sum is σ = 80458110. Its totient is φ = 20193280.

The previous prime is 40386667. The next prime is 40386691. The reversal of 40386688 is 88668304.

It can be written as a sum of positive squares in only one way, i.e., 29680704 + 10705984 = 5448^2 + 3272^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157633 + ... + 157888.

Almost surely, 2^40386688 is an apocalyptic number.

It is an amenable number.

40386688 is a deficient number, since it is larger than the sum of its proper divisors (40071422).

40386688 is an equidigital number, since it uses as much as digits as its factorization.

40386688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315535 (or 315523 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 40386688 is about 6355.0521634366. The cubic root of 40386688 is about 343.0937023531.

The spelling of 40386688 in words is "forty million, three hundred eighty-six thousand, six hundred eighty-eight".