623352720 has 40 divisors (see below), whose sum is σ = 1932394176. Its totient is φ = 166227328.

The previous prime is 623352701. The next prime is 623352721. The reversal of 623352720 is 27253326.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×623352720² = 777137227062796800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (623352721) 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, 1298412 + ... + 1298891.

Almost surely, 2^623352720 is an apocalyptic number.

623352720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623352720 is an abundant number, since it is smaller than the sum of its proper divisors (1309041456).

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

623352720 is a wasteful number, since it uses less digits than its factorization.

623352720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597319 (or 2597313 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 623352720 is about 24967.0326630939. The cubic root of 623352720 is about 854.2361633348.

The spelling of 623352720 in words is "six hundred twenty-three million, three hundred fifty-two thousand, seven hundred twenty".