623812 has 12 divisors (see below), whose sum is σ = 1247680. Its totient is φ = 267336.

The previous prime is 623803. The next prime is 623839. The reversal of 623812 is 218326.

623812 is an admirable number.

It is a super-2 number, since 2×623812² = 778282822688, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11112 + ... + 11167.

2⁶²³⁸¹² is an apocalyptic number.

It is an amenable number.

623812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

623812 is a wasteful number, since it uses less digits than its factorization.

623812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22290 (or 22288 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 623812 is about 789.8177004854. The cubic root of 623812 is about 85.4445909361. Note that the first 3 decimals are identical.

The spelling of 623812 in words is "six hundred twenty-three thousand, eight hundred twelve".