623439816 has 32 divisors (see below), whose sum is σ = 1567317600. Its totient is φ = 206650880.

The previous prime is 623439811. The next prime is 623439851. The reversal of 623439816 is 618934326.

623439816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×623439816² = 777354408348227712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (623439811) 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, 68265 + ... + 76856.

It is an arithmetic number, because the mean of its divisors is an integer number (48978675).

Almost surely, 2^623439816 is an apocalyptic number.

It is an amenable number.

623439816 is an abundant number, since it is smaller than the sum of its proper divisors (943877784).

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

623439816 is a wasteful number, since it uses less digits than its factorization.

623439816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145309 (or 145305 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 623439816 is about 24968.7768222634. The cubic root of 623439816 is about 854.2759466365.

The spelling of 623439816 in words is "six hundred twenty-three million, four hundred thirty-nine thousand, eight hundred sixteen".