85133880 has 96 divisors (see below), whose sum is σ = 297984960. Its totient is φ = 20954880.

The previous prime is 85133869. The next prime is 85133897. The reversal of 85133880 is 8833158.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4416 + ... + 13775.

It is an arithmetic number, because the mean of its divisors is an integer number (3104010).

Almost surely, 2^85133880 is an apocalyptic number.

It is an amenable number.

85133880 is an abundant number, since it is smaller than the sum of its proper divisors (212851080).

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

85133880 is a wasteful number, since it uses less digits than its factorization.

85133880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18221 (or 18214 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 85133880 is about 9226.8022629728. The cubic root of 85133880 is about 439.9136883041.

The spelling of 85133880 in words is "eighty-five million, one hundred thirty-three thousand, eight hundred eighty".