620899980 has 24 divisors (see below), whose sum is σ = 1738520112. Its totient is φ = 165573312.

The previous prime is 620899969. The next prime is 620899987. The reversal of 620899980 is 89998026.

It is not an unprimeable number, because it can be changed into a prime (620899987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5174107 + ... + 5174226.

It is an arithmetic number, because the mean of its divisors is an integer number (72438338).

Almost surely, 2^620899980 is an apocalyptic number.

620899980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620899980 is an abundant number, since it is smaller than the sum of its proper divisors (1117620132).

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

620899980 is a wasteful number, since it uses less digits than its factorization.

620899980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10348345 (or 10348343 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 620899980 is about 24917.8646757703. The cubic root of 620899980 is about 853.1142873777.

The spelling of 620899980 in words is "six hundred twenty million, eight hundred ninety-nine thousand, nine hundred eighty".