86121580 has 24 divisors (see below), whose sum is σ = 183405600. Its totient is φ = 33962880.

The previous prime is 86121571. The next prime is 86121593. The reversal of 86121580 is 8512168.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28905 + ... + 31744.

It is an arithmetic number, because the mean of its divisors is an integer number (7641900).

Almost surely, 2^86121580 is an apocalyptic number.

It is an amenable number.

86121580 is an abundant number, since it is smaller than the sum of its proper divisors (97284020).

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

86121580 is a wasteful number, since it uses less digits than its factorization.

86121580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60729 (or 60727 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 86121580 is about 9280.1713346252. The cubic root of 86121580 is about 441.6084040072.

The spelling of 86121580 in words is "eighty-six million, one hundred twenty-one thousand, five hundred eighty".