623346864 has 80 divisors (see below), whose sum is σ = 1852857600. Its totient is φ = 176889600.

The previous prime is 623346839. The next prime is 623346887. The reversal of 623346864 is 468643326.

It is a happy number.

It is a super-2 number, since 2×623346864² = 777122625717268992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43839 + ... + 56289.

It is an arithmetic number, because the mean of its divisors is an integer number (23160720).

Almost surely, 2^623346864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623346864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926428800).

623346864 is an abundant number, since it is smaller than the sum of its proper divisors (1229510736).

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

623346864 is a wasteful number, since it uses less digits than its factorization.

623346864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12618 (or 12612 counting only the distinct ones).

The product of its digits is 497664, while the sum is 42.

The square root of 623346864 is about 24966.9153881692. The cubic root of 623346864 is about 854.2334883257.

The spelling of 623346864 in words is "six hundred twenty-three million, three hundred forty-six thousand, eight hundred sixty-four".