40087812 has 24 divisors (see below), whose sum is σ = 93671200. Its totient is φ = 13343616.

The previous prime is 40087793. The next prime is 40087813. The reversal of 40087812 is 21878004.

It is a self number, because there is not a number n which added to its sum of digits gives 40087812.

It is not an unprimeable number, because it can be changed into a prime (40087813) 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, 8364 + ... + 12252.

Almost surely, 2^40087812 is an apocalyptic number.

It is an amenable number.

40087812 is an abundant number, since it is smaller than the sum of its proper divisors (53583388).

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

40087812 is a wasteful number, since it uses less digits than its factorization.

40087812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755 (or 4753 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 40087812 is about 6331.4936626360. The cubic root of 40087812 is about 342.2452671057.

The spelling of 40087812 in words is "forty million, eighty-seven thousand, eight hundred twelve".