623431680 has 208 divisors, whose sum is σ = 2036610240. Its totient is φ = 162791424.

The previous prime is 623431663. The next prime is 623431681. The reversal of 623431680 is 86134326.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623431681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4485051 + ... + 4485189.

Almost surely, 2^623431680 is an apocalyptic number.

623431680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623431680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018305120).

623431680 is an abundant number, since it is smaller than the sum of its proper divisors (1413178560).

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

623431680 is a wasteful number, since it uses less digits than its factorization.

623431680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 623431680 is about 24968.6138982523. The cubic root of 623431680 is about 854.2722304696.

The spelling of 623431680 in words is "six hundred twenty-three million, four hundred thirty-one thousand, six hundred eighty".