86478780 has 24 divisors (see below), whose sum is σ = 242140752. Its totient is φ = 23060992.

The previous prime is 86478773. The next prime is 86478811. The reversal of 86478780 is 8787468.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720597 + ... + 720716.

It is an arithmetic number, because the mean of its divisors is an integer number (10089198).

Almost surely, 2^86478780 is an apocalyptic number.

It is an amenable number.

86478780 is an abundant number, since it is smaller than the sum of its proper divisors (155661972).

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

86478780 is a wasteful number, since it uses less digits than its factorization.

86478780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441325 (or 1441323 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 48.

The square root of 86478780 is about 9299.3967546288. The cubic root of 86478780 is about 442.2181038348.

The spelling of 86478780 in words is "eighty-six million, four hundred seventy-eight thousand, seven hundred eighty".