78790187 has 24 divisors (see below), whose sum is σ = 96132000. Its totient is φ = 64473024.

The previous prime is 78790133. The next prime is 78790213. The reversal of 78790187 is 78109787.

It is not a de Polignac number, because 78790187 - 2⁶ = 78790123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78790687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 885239 + ... + 885327.

It is an arithmetic number, because the mean of its divisors is an integer number (4005500).

Almost surely, 2^78790187 is an apocalyptic number.

78790187 is a deficient number, since it is larger than the sum of its proper divisors (17341813).

78790187 is an frugal number, since it uses more digits than its factorization.

78790187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 47.

The square root of 78790187 is about 8876.3836667868. The cubic root of 78790187 is about 428.7038434277.

The spelling of 78790187 in words is "seventy-eight million, seven hundred ninety thousand, one hundred eighty-seven".