679201520 has 20 divisors (see below), whose sum is σ = 1579143720. Its totient is φ = 271680576.

The previous prime is 679201517. The next prime is 679201541. The reversal of 679201520 is 25102976.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×679201520² = 922629409540620800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4244930 + ... + 4245089.

It is an arithmetic number, because the mean of its divisors is an integer number (78957186).

Almost surely, 2^679201520 is an apocalyptic number.

It is an amenable number.

679201520 is an abundant number, since it is smaller than the sum of its proper divisors (899942200).

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

679201520 is a wasteful number, since it uses less digits than its factorization.

679201520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8490032 (or 8490026 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 679201520 is about 26061.4949686314. The cubic root of 679201520 is about 879.0216054498.

The spelling of 679201520 in words is "six hundred seventy-nine million, two hundred one thousand, five hundred twenty".