40188672 has 54 divisors (see below), whose sum is σ = 115880492. Its totient is φ = 13395456.

The previous prime is 40188671. The next prime is 40188689. The reversal of 40188672 is 27688104.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (40188671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6418 + ... + 11025.

Almost surely, 2^40188672 is an apocalyptic number.

It is an amenable number.

40188672 is an abundant number, since it is smaller than the sum of its proper divisors (75691820).

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

40188672 is a wasteful number, since it uses less digits than its factorization.

40188672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17465 (or 17448 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 40188672 is about 6339.4536042154. The cubic root of 40188672 is about 342.5320537603.

The spelling of 40188672 in words is "forty million, one hundred eighty-eight thousand, six hundred seventy-two".