79879780 has 48 divisors (see below), whose sum is σ = 171097920. Its totient is φ = 31321728.

The previous prime is 79879769. The next prime is 79879783. The reversal of 79879780 is 8797897.

It is not an unprimeable number, because it can be changed into a prime (79879783) 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 15 ways as a sum of consecutive naturals, for example, 348706 + ... + 348934.

It is an arithmetic number, because the mean of its divisors is an integer number (3564540).

Almost surely, 2^79879780 is an apocalyptic number.

It is an amenable number.

79879780 is an abundant number, since it is smaller than the sum of its proper divisors (91218140).

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

79879780 is a wasteful number, since it uses less digits than its factorization.

79879780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 55.

The square root of 79879780 is about 8937.5488809852. The cubic root of 79879780 is about 430.6709913503.

The spelling of 79879780 in words is "seventy-nine million, eight hundred seventy-nine thousand, seven hundred eighty".