679940298 has 32 divisors (see below), whose sum is σ = 1559723520. Its totient is φ = 219335040.

The previous prime is 679940291. The next prime is 679940309. The reversal of 679940298 is 892049976.

679940298 is a `hidden beast` number, since 67 + 99 + 402 + 98 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (679940291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201415 + ... + 204762.

It is an arithmetic number, because the mean of its divisors is an integer number (48741360).

Almost surely, 2^679940298 is an apocalyptic number.

679940298 is an abundant number, since it is smaller than the sum of its proper divisors (879783222).

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

679940298 is a wasteful number, since it uses less digits than its factorization.

679940298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406219 (or 406213 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 679940298 is about 26075.6648620893. The cubic root of 679940298 is about 879.3401984309.

The spelling of 679940298 in words is "six hundred seventy-nine million, nine hundred forty thousand, two hundred ninety-eight".