40644372 has 24 divisors (see below), whose sum is σ = 94995936. Its totient is φ = 13525408.

The previous prime is 40644371. The next prime is 40644377. The reversal of 40644372 is 27344604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40644371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5623 + ... + 10625.

It is an arithmetic number, because the mean of its divisors is an integer number (3958164).

Almost surely, 2^40644372 is an apocalyptic number.

It is an amenable number.

40644372 is an abundant number, since it is smaller than the sum of its proper divisors (54351564).

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

40644372 is a wasteful number, since it uses less digits than its factorization.

40644372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5687 (or 5685 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 40644372 is about 6375.2938755794. The cubic root of 40644372 is about 343.8218497965.

Adding to 40644372 its reverse (27344604), we get a palindrome (67988976).

The spelling of 40644372 in words is "forty million, six hundred forty-four thousand, three hundred seventy-two".