40391136 has 60 divisors (see below), whose sum is σ = 118796832. Its totient is φ = 13462848.

The previous prime is 40391129. The next prime is 40391173. The reversal of 40391136 is 63119304.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5200 + ... + 10383.

Almost surely, 2^40391136 is an apocalyptic number.

It is an amenable number.

40391136 is an abundant number, since it is smaller than the sum of its proper divisors (78405696).

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

40391136 is a wasteful number, since it uses less digits than its factorization.

40391136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15605 (or 15588 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 40391136 is about 6355.4021115898. The cubic root of 40391136 is about 343.1062974667.

The spelling of 40391136 in words is "forty million, three hundred ninety-one thousand, one hundred thirty-six".