40812864 has 56 divisors (see below), whose sum is σ = 111483648. Its totient is φ = 13163520.

The previous prime is 40812857. The next prime is 40812899. The reversal of 40812864 is 46821804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2524 + ... + 9380.

Almost surely, 2^40812864 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 40812864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55741824).

40812864 is an abundant number, since it is smaller than the sum of its proper divisors (70670784).

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

40812864 is a wasteful number, since it uses less digits than its factorization.

40812864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6903 (or 6893 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 40812864 is about 6388.4946583683. The cubic root of 40812864 is about 344.2963014074.

The spelling of 40812864 in words is "forty million, eight hundred twelve thousand, eight hundred sixty-four".