623355264 has 288 divisors, whose sum is σ = 2169203400. Its totient is φ = 177666048.

The previous prime is 623355263. The next prime is 623355277. The reversal of 623355264 is 462553326.

623355264 is a `hidden beast` number, since 62 + 335 + 5 + 264 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623355263) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1523892 + ... + 1524300.

Almost surely, 2^623355264 is an apocalyptic number.

623355264 is a gapful number since it is divisible by the number (64) 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 623355264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1084601700).

623355264 is an abundant number, since it is smaller than the sum of its proper divisors (1545848136).

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

623355264 is an equidigital number, since it uses as much as digits as its factorization.

623355264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 421 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The square root of 623355264 is about 24967.0836102257. The cubic root of 623355264 is about 854.2373254237.

The spelling of 623355264 in words is "six hundred twenty-three million, three hundred fifty-five thousand, two hundred sixty-four".