679742244 has 72 divisors (see below), whose sum is σ = 1783207608. Its totient is φ = 218142720.

The previous prime is 679742243. The next prime is 679742249. The reversal of 679742244 is 442247976.

It can be written as a sum of positive squares in 4 ways, for example, as 297148644 + 382593600 = 17238^2 + 19560^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 679742244.

It is not an unprimeable number, because it can be changed into a prime (679742243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126574 + ... + 131834.

Almost surely, 2^679742244 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 679742244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891603804).

679742244 is an abundant number, since it is smaller than the sum of its proper divisors (1103465364).

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

679742244 is a wasteful number, since it uses less digits than its factorization.

679742244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405 (or 5400 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 679742244 is about 26071.8669066870. The cubic root of 679742244 is about 879.2548116420.

The spelling of 679742244 in words is "six hundred seventy-nine million, seven hundred forty-two thousand, two hundred forty-four".