86507780 has 12 divisors (see below), whose sum is σ = 181666380. Its totient is φ = 34603104.

The previous prime is 86507767. The next prime is 86507791. The reversal of 86507780 is 8770568.

It can be written as a sum of positive squares in 2 ways, for example, as 60964864 + 25542916 = 7808^2 + 5054^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2162675 + ... + 2162714.

It is an arithmetic number, because the mean of its divisors is an integer number (15138865).

Almost surely, 2^86507780 is an apocalyptic number.

It is an amenable number.

86507780 is an abundant number, since it is smaller than the sum of its proper divisors (95158600).

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

86507780 is a wasteful number, since it uses less digits than its factorization.

86507780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4325398 (or 4325396 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 86507780 is about 9300.9558648560. The cubic root of 86507780 is about 442.2675298010.

The spelling of 86507780 in words is "eighty-six million, five hundred seven thousand, seven hundred eighty".