623916720 has 240 divisors, whose sum is σ = 2426511360. Its totient is φ = 140714496.

The previous prime is 623916703. The next prime is 623916767. The reversal of 623916720 is 27619326.

623916720 is a `hidden beast` number, since 623 + 9 + 1 + 6 + 7 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 397377 + ... + 398943.

It is an arithmetic number, because the mean of its divisors is an integer number (10110464).

Almost surely, 2^623916720 is an apocalyptic number.

623916720 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 623916720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213255680).

623916720 is an abundant number, since it is smaller than the sum of its proper divisors (1802594640).

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

623916720 is a wasteful number, since it uses less digits than its factorization.

623916720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672 (or 1663 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 623916720 is about 24978.3250038909. The cubic root of 623916720 is about 854.4937189415.

The spelling of 623916720 in words is "six hundred twenty-three million, nine hundred sixteen thousand, seven hundred twenty".