85820920 has 32 divisors (see below), whose sum is σ = 195274800. Its totient is φ = 33941248.

The previous prime is 85820909. The next prime is 85820923. The reversal of 85820920 is 2902858.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85820923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8494 + ... + 15613.

Almost surely, 2^85820920 is an apocalyptic number.

It is an amenable number.

85820920 is an abundant number, since it is smaller than the sum of its proper divisors (109453880).

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

85820920 is a wasteful number, since it uses less digits than its factorization.

85820920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24207 (or 24203 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 85820920 is about 9263.9581173492. The cubic root of 85820920 is about 441.0939034887.

The spelling of 85820920 in words is "eighty-five million, eight hundred twenty thousand, nine hundred twenty".