40642388 has 12 divisors (see below), whose sum is σ = 72126432. Its totient is φ = 20034840.

The previous prime is 40642373. The next prime is 40642397. The reversal of 40642388 is 88324604.

It is a congruent number.

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, 71270 + ... + 71837.

It is an arithmetic number, because the mean of its divisors is an integer number (6010536).

Almost surely, 2^40642388 is an apocalyptic number.

It is an amenable number.

40642388 is a deficient number, since it is larger than the sum of its proper divisors (31484044).

40642388 is a wasteful number, since it uses less digits than its factorization.

40642388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143182 (or 143180 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 40642388 is about 6375.1382730102. The cubic root of 40642388 is about 343.8162553061.

The spelling of 40642388 in words is "forty million, six hundred forty-two thousand, three hundred eighty-eight".