679918890 has 32 divisors (see below), whose sum is σ = 1864920960. Its totient is φ = 155409984.

The previous prime is 679918879. The next prime is 679918903. The reversal of 679918890 is 98819976.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 679918890.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1618645 + ... + 1619064.

It is an arithmetic number, because the mean of its divisors is an integer number (58278780).

Almost surely, 2^679918890 is an apocalyptic number.

679918890 is an abundant number, since it is smaller than the sum of its proper divisors (1185002070).

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

679918890 is a wasteful number, since it uses less digits than its factorization.

679918890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237726.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 679918890 is about 26075.2543611755. The cubic root of 679918890 is about 879.3309696243.

The spelling of 679918890 in words is "six hundred seventy-nine million, nine hundred eighteen thousand, eight hundred ninety".