40045816 has 16 divisors (see below), whose sum is σ = 75184200. Its totient is φ = 19996704.

The previous prime is 40045777. The next prime is 40045843. The reversal of 40045816 is 61854004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4230 + ... + 9898.

Almost surely, 2^40045816 is an apocalyptic number.

It is an amenable number.

40045816 is a deficient number, since it is larger than the sum of its proper divisors (35138384).

40045816 is a wasteful number, since it uses less digits than its factorization.

40045816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558 (or 6554 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40045816 is about 6328.1763565817. The cubic root of 40045816 is about 342.1257132773.

The spelling of 40045816 in words is "forty million, forty-five thousand, eight hundred sixteen".