40512816 has 30 divisors (see below), whose sum is σ = 113380020. Its totient is φ = 13504224.

The previous prime is 40512803. The next prime is 40512827. The reversal of 40512816 is 61821504.

It is a self number, because there is not a number n which added to its sum of digits gives 40512816.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140526 + ... + 140813.

It is an arithmetic number, because the mean of its divisors is an integer number (3779334).

Almost surely, 2^40512816 is an apocalyptic number.

It is an amenable number.

40512816 is an abundant number, since it is smaller than the sum of its proper divisors (72867204).

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

40512816 is a wasteful number, since it uses less digits than its factorization.

40512816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281353 (or 281344 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 40512816 is about 6364.9678710894. The cubic root of 40512816 is about 343.4504927920.

It can be divided in two parts, 40512 and 816, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 40512816 in words is "forty million, five hundred twelve thousand, eight hundred sixteen".