679540740 has 48 divisors (see below), whose sum is σ = 1903910400. Its totient is φ = 181096960.

The previous prime is 679540723. The next prime is 679540747. The reversal of 679540740 is 47045976.

It is a junction number, because it is equal to n+sod(n) for n = 679540692 and 679540701.

It is not an unprimeable number, because it can be changed into a prime (679540747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141580 + ... + 146300.

It is an arithmetic number, because the mean of its divisors is an integer number (39664800).

Almost surely, 2^679540740 is an apocalyptic number.

679540740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

679540740 is an abundant number, since it is smaller than the sum of its proper divisors (1224369660).

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

679540740 is a wasteful number, since it uses less digits than its factorization.

679540740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132 (or 7130 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 679540740 is about 26068.0022249500. The cubic root of 679540740 is about 879.1679204353.

The spelling of 679540740 in words is "six hundred seventy-nine million, five hundred forty thousand, seven hundred forty".