40640832 has 112 divisors (see below), whose sum is σ = 123748800. Its totient is φ = 13063680.

The previous prime is 40640827. The next prime is 40640843. The reversal of 40640832 is 23804604.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 40640796 and 40640805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49707 + ... + 50517.

It is an arithmetic number, because the mean of its divisors is an integer number (1104900).

Almost surely, 2^40640832 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 40640832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61874400).

40640832 is an abundant number, since it is smaller than the sum of its proper divisors (83107968).

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

40640832 is a wasteful number, since it uses less digits than its factorization.

40640832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 40640832 is about 6375.0162352734. The cubic root of 40640832 is about 343.8118675642.

The spelling of 40640832 in words is "forty million, six hundred forty thousand, eight hundred thirty-two".