623969280 has 264 divisors, whose sum is σ = 2360502144. Its totient is φ = 151142400.

The previous prime is 623969273. The next prime is 623969351. The reversal of 623969280 is 82969326.

It is a tau number, because it is divible by the number of its divisors (264).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 506265 + ... + 507495.

It is an arithmetic number, because the mean of its divisors is an integer number (8941296).

Almost surely, 2^623969280 is an apocalyptic number.

623969280 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 623969280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180251072).

623969280 is an abundant number, since it is smaller than the sum of its proper divisors (1736532864).

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

623969280 is a wasteful number, since it uses less digits than its factorization.

623969280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1252 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 623969280 is about 24979.3770939149. The cubic root of 623969280 is about 854.5177130246.

The spelling of 623969280 in words is "six hundred twenty-three million, nine hundred sixty-nine thousand, two hundred eighty".