86721060 has 24 divisors (see below), whose sum is σ = 242819136. Its totient is φ = 23125600.

The previous prime is 86721031. The next prime is 86721071. The reversal of 86721060 is 6012768.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 722616 + ... + 722735.

It is an arithmetic number, because the mean of its divisors is an integer number (10117464).

Almost surely, 2^86721060 is an apocalyptic number.

It is an amenable number.

86721060 is an abundant number, since it is smaller than the sum of its proper divisors (156098076).

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

86721060 is a wasteful number, since it uses less digits than its factorization.

86721060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445363 (or 1445361 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 86721060 is about 9312.4142949076. The cubic root of 86721060 is about 442.6306933054.

The spelling of 86721060 in words is "eighty-six million, seven hundred twenty-one thousand, sixty".