679994784 has 192 divisors, whose sum is σ = 2345414400. Its totient is φ = 187536384.

The previous prime is 679994779. The next prime is 679994803. The reversal of 679994784 is 487499976.

679994784 is a `hidden beast` number, since 6 + 79 + 99 + 478 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 173454 + ... + 177330.

It is an arithmetic number, because the mean of its divisors is an integer number (12215700).

Almost surely, 2^679994784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679994784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172707200).

679994784 is an abundant number, since it is smaller than the sum of its proper divisors (1665419616).

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

679994784 is a wasteful number, since it uses less digits than its factorization.

679994784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932 (or 3918 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The square root of 679994784 is about 26076.7096083843. The cubic root of 679994784 is about 879.3636860079.

The spelling of 679994784 in words is "six hundred seventy-nine million, nine hundred ninety-four thousand, seven hundred eighty-four".