40164972 has 12 divisors (see below), whose sum is σ = 93718296. Its totient is φ = 13388320.

The previous prime is 40164961. The next prime is 40164977. The reversal of 40164972 is 27946104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×40164972² = 3226449951521568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (40164977) 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, 1673529 + ... + 1673552.

It is an arithmetic number, because the mean of its divisors is an integer number (7809858).

Almost surely, 2^40164972 is an apocalyptic number.

It is an amenable number.

40164972 is an abundant number, since it is smaller than the sum of its proper divisors (53553324).

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

40164972 is a wasteful number, since it uses less digits than its factorization.

40164972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347088 (or 3347086 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 40164972 is about 6337.5840822825. The cubic root of 40164972 is about 342.4647080335.

The spelling of 40164972 in words is "forty million, one hundred sixty-four thousand, nine hundred seventy-two".