624989380 has 24 divisors (see below), whose sum is σ = 1319736600. Its totient is φ = 248613120.

The previous prime is 624989279. The next prime is 624989441. The reversal of 624989380 is 83989426.

It can be written as a sum of positive squares in 4 ways, for example, as 79673476 + 545315904 = 8926^2 + 23352^2 .

It is a super-2 number, since 2×624989380² = 781223450225568800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82705 + ... + 89944.

It is an arithmetic number, because the mean of its divisors is an integer number (54989025).

Almost surely, 2^624989380 is an apocalyptic number.

It is an amenable number.

624989380 is an abundant number, since it is smaller than the sum of its proper divisors (694747220).

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

624989380 is a wasteful number, since it uses less digits than its factorization.

624989380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172839 (or 172837 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 624989380 is about 24999.7875990977. The cubic root of 624989380 is about 854.9831306590.

The spelling of 624989380 in words is "six hundred twenty-four million, nine hundred eighty-nine thousand, three hundred eighty".