79898880 has 72 divisors (see below), whose sum is σ = 255189312. Its totient is φ = 21305344.

The previous prime is 79898879. The next prime is 79898881. The reversal of 79898880 is 8889897.

It is an interprime number because it is at equal distance from previous prime (79898879) and next prime (79898881).

It is a self number, because there is not a number n which added to its sum of digits gives 79898880.

It is not an unprimeable number, because it can be changed into a prime (79898881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6564 + ... + 14243.

It is an arithmetic number, because the mean of its divisors is an integer number (3544296).

Almost surely, 2^79898880 is an apocalyptic number.

It is an amenable number.

79898880 is an abundant number, since it is smaller than the sum of its proper divisors (175290432).

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

79898880 is a wasteful number, since it uses less digits than its factorization.

79898880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20831 (or 20817 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 57.

The square root of 79898880 is about 8938.6173427438. The cubic root of 79898880 is about 430.7053144309.

The spelling of 79898880 in words is "seventy-nine million, eight hundred ninety-eight thousand, eight hundred eighty".