679921920 has 108 divisors (see below), whose sum is σ = 2352498876. Its totient is φ = 181309440.

The previous prime is 679921903. The next prime is 679921937. The reversal of 679921920 is 29129976.

It is an interprime number because it is at equal distance from previous prime (679921903) and next prime (679921937).

It can be written as a sum of positive squares in 2 ways, for example, as 225720576 + 454201344 = 15024^2 + 21312^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17991 + ... + 41030.

It is an arithmetic number, because the mean of its divisors is an integer number (21782397).

Almost surely, 2^679921920 is an apocalyptic number.

679921920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

679921920 is an abundant number, since it is smaller than the sum of its proper divisors (1672576956).

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

679921920 is a wasteful number, since it uses less digits than its factorization.

679921920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59048 (or 59031 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 679921920 is about 26075.3124621739. The cubic root of 679921920 is about 879.3322758433.

The spelling of 679921920 in words is "six hundred seventy-nine million, nine hundred twenty-one thousand, nine hundred twenty".