679432340 has 24 divisors (see below), whose sum is σ = 1427866440. Its totient is φ = 271571328.

The previous prime is 679432339. The next prime is 679432357. The reversal of 679432340 is 43234976.

It can be written as a sum of positive squares in 4 ways, for example, as 4056196 + 675376144 = 2014^2 + 25988^2 .

It is a junction number, because it is equal to n+sod(n) for n = 679432294 and 679432303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16694 + ... + 40466.

It is an arithmetic number, because the mean of its divisors is an integer number (59494435).

Almost surely, 2^679432340 is an apocalyptic number.

It is an amenable number.

679432340 is an abundant number, since it is smaller than the sum of its proper divisors (748434100).

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

679432340 is a wasteful number, since it uses less digits than its factorization.

679432340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25211 (or 25209 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 679432340 is about 26065.9229646679. The cubic root of 679432340 is about 879.1211698065.

The spelling of 679432340 in words is "six hundred seventy-nine million, four hundred thirty-two thousand, three hundred forty".