679891938 has 32 divisors (see below), whose sum is σ = 1531256832. Its totient is φ = 199381200.

The previous prime is 679891913. The next prime is 679891939. The reversal of 679891938 is 839198976.

It is not an unprimeable number, because it can be changed into a prime (679891939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164106 + ... + 168197.

It is an arithmetic number, because the mean of its divisors is an integer number (47851776).

Almost surely, 2^679891938 is an apocalyptic number.

679891938 is an abundant number, since it is smaller than the sum of its proper divisors (851364894).

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

679891938 is a wasteful number, since it uses less digits than its factorization.

679891938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332350.

The product of its digits is 5878656, while the sum is 60.

The square root of 679891938 is about 26074.7375442208. The cubic root of 679891938 is about 879.3193505710.

The spelling of 679891938 in words is "six hundred seventy-nine million, eight hundred ninety-one thousand, nine hundred thirty-eight".