86521800 has 48 divisors (see below), whose sum is σ = 268219440. Its totient is φ = 23072320.

The previous prime is 86521793. The next prime is 86521829. The reversal of 86521800 is 812568.

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 11 ways as a sum of consecutive naturals, for example, 71502 + ... + 72701.

It is an arithmetic number, because the mean of its divisors is an integer number (5587905).

Almost surely, 2^86521800 is an apocalyptic number.

It is an amenable number.

86521800 is an abundant number, since it is smaller than the sum of its proper divisors (181697640).

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

86521800 is a wasteful number, since it uses less digits than its factorization.

86521800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144222 (or 144213 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 86521800 is about 9301.7095202979. The cubic root of 86521800 is about 442.2914207382.

The spelling of 86521800 in words is "eighty-six million, five hundred twenty-one thousand, eight hundred".