679940370 has 24 divisors (see below), whose sum is σ = 1767845196. Its totient is φ = 181317408.

The previous prime is 679940369. The next prime is 679940377. The reversal of 679940370 is 73049976.

It can be written as a sum of positive squares in 2 ways, for example, as 592386921 + 87553449 = 24339^2 + 9357^2 .

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

It is not an unprimeable number, because it can be changed into a prime (679940377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3777357 + ... + 3777536.

Almost surely, 2^679940370 is an apocalyptic number.

679940370 is an abundant number, since it is smaller than the sum of its proper divisors (1087904826).

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

679940370 is a wasteful number, since it uses less digits than its factorization.

679940370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7554906 (or 7554903 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 679940370 is about 26075.6662426869. Note that the first 3 decimals coincide. The cubic root of 679940370 is about 879.3402294691.

The spelling of 679940370 in words is "six hundred seventy-nine million, nine hundred forty thousand, three hundred seventy".