78980880 has 80 divisors (see below), whose sum is σ = 267107904. Its totient is φ = 19146240.

The previous prime is 78980879. The next prime is 78980893. The reversal of 78980880 is 8808987.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12319 + ... + 17598.

Almost surely, 2^78980880 is an apocalyptic number.

It is an amenable number.

78980880 is an abundant number, since it is smaller than the sum of its proper divisors (188127024).

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

78980880 is a wasteful number, since it uses less digits than its factorization.

78980880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29944 (or 29938 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The square root of 78980880 is about 8887.1187681948. The cubic root of 78980880 is about 429.0494235092.

The spelling of 78980880 in words is "seventy-eight million, nine hundred eighty thousand, eight hundred eighty".