78980187 has 32 divisors (see below), whose sum is σ = 125508096. Its totient is φ = 43545600.

The previous prime is 78980141. The next prime is 78980221. The reversal of 78980187 is 78108987.

It is not a de Polignac number, because 78980187 - 2¹² = 78976091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78980287) 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 31 ways as a sum of consecutive naturals, for example, 29163 + ... + 31755.

It is an arithmetic number, because the mean of its divisors is an integer number (3922128).

Almost surely, 2^78980187 is an apocalyptic number.

78980187 is a deficient number, since it is larger than the sum of its proper divisors (46527909).

78980187 is a wasteful number, since it uses less digits than its factorization.

78980187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691.

The product of its (nonzero) digits is 225792, while the sum is 48.

The square root of 78980187 is about 8887.0797790950. The cubic root of 78980187 is about 429.0481686395.

The spelling of 78980187 in words is "seventy-eight million, nine hundred eighty thousand, one hundred eighty-seven".