40389186 has 16 divisors (see below), whose sum is σ = 80999424. Its totient is φ = 13426224.

The previous prime is 40389149. The next prime is 40389191. The reversal of 40389186 is 68198304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6786 + ... + 11261.

It is an arithmetic number, because the mean of its divisors is an integer number (5062464).

Almost surely, 2^40389186 is an apocalyptic number.

40389186 is an abundant number, since it is smaller than the sum of its proper divisors (40610238).

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

40389186 is a wasteful number, since it uses less digits than its factorization.

40389186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 40389186 is about 6355.2486969433. The cubic root of 40389186 is about 343.1007758918.

The spelling of 40389186 in words is "forty million, three hundred eighty-nine thousand, one hundred eighty-six".