623994980 has 48 divisors (see below), whose sum is σ = 1499057280. Its totient is φ = 213731328.

The previous prime is 623994977. The next prime is 623994989. The reversal of 623994980 is 89499326.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (623994989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225284 + ... + 228036.

It is an arithmetic number, because the mean of its divisors is an integer number (31230360).

Almost surely, 2^623994980 is an apocalyptic number.

It is an amenable number.

623994980 is an abundant number, since it is smaller than the sum of its proper divisors (875062300).

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

623994980 is a wasteful number, since it uses less digits than its factorization.

623994980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388 (or 4386 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 623994980 is about 24979.8915129750. The cubic root of 623994980 is about 854.5294448007.

The spelling of 623994980 in words is "six hundred twenty-three million, nine hundred ninety-four thousand, nine hundred eighty".