40188164 has 12 divisors (see below), whose sum is σ = 70495488. Its totient is φ = 20046600.

The previous prime is 40188163. The next prime is 40188193. The reversal of 40188164 is 46188104.

It is a self number, because there is not a number n which added to its sum of digits gives 40188164.

It is not an unprimeable number, because it can be changed into a prime (40188163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9932 + ... + 13379.

It is an arithmetic number, because the mean of its divisors is an integer number (5874624).

Almost surely, 2^40188164 is an apocalyptic number.

It is an amenable number.

40188164 is a deficient number, since it is larger than the sum of its proper divisors (30307324).

40188164 is a wasteful number, since it uses less digits than its factorization.

40188164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23746 (or 23744 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 40188164 is about 6339.4135375443. The cubic root of 40188164 is about 342.5306105094.

The spelling of 40188164 in words is "forty million, one hundred eighty-eight thousand, one hundred sixty-four".