679694220 has 192 divisors, whose sum is σ = 2298777600. Its totient is φ = 166095360.

The previous prime is 679694179. The next prime is 679694227. The reversal of 679694220 is 22496976.

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

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 (679694227) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 316992 + ... + 319128.

It is an arithmetic number, because the mean of its divisors is an integer number (11972800).

Almost surely, 2^679694220 is an apocalyptic number.

679694220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679694220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149388800).

679694220 is an abundant number, since it is smaller than the sum of its proper divisors (1619083380).

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

679694220 is a wasteful number, since it uses less digits than its factorization.

679694220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205 (or 2197 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 679694220 is about 26070.9458976846. The cubic root of 679694220 is about 879.2341046128.

The spelling of 679694220 in words is "six hundred seventy-nine million, six hundred ninety-four thousand, two hundred twenty".