40165504 has 32 divisors (see below), whose sum is σ = 80539200. Its totient is φ = 19951872.

The previous prime is 40165501. The next prime is 40165561. The reversal of 40165504 is 40556104.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×40165504² = 3226535423148032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40165501) 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, 20437 + ... + 22315.

It is an arithmetic number, because the mean of its divisors is an integer number (2516850).

Almost surely, 2^40165504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40165504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40269600).

40165504 is an abundant number, since it is smaller than the sum of its proper divisors (40373696).

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

40165504 is a wasteful number, since it uses less digits than its factorization.

40165504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060 (or 2048 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 40165504 is about 6337.6260539732. The cubic root of 40165504 is about 342.4662200510.

The spelling of 40165504 in words is "forty million, one hundred sixty-five thousand, five hundred four".