78870780 has 48 divisors (see below), whose sum is σ = 245377440. Its totient is φ = 21032064.

The previous prime is 78870739. The next prime is 78870809. The reversal of 78870780 is 8707887.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72489 + ... + 73568.

It is an arithmetic number, because the mean of its divisors is an integer number (5112030).

Almost surely, 2^78870780 is an apocalyptic number.

It is an amenable number.

78870780 is an abundant number, since it is smaller than the sum of its proper divisors (166506660).

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

78870780 is a wasteful number, since it uses less digits than its factorization.

78870780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146075 (or 146067 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The square root of 78870780 is about 8880.9222494063. The cubic root of 78870780 is about 428.8499646496.

The spelling of 78870780 in words is "seventy-eight million, eight hundred seventy thousand, seven hundred eighty".