85655820 has 48 divisors (see below), whose sum is σ = 243226368. Its totient is φ = 22518720.

The previous prime is 85655813. The next prime is 85655827. The reversal of 85655820 is 2855658.

It is an interprime number because it is at equal distance from previous prime (85655813) and next prime (85655827).

It is not an unprimeable number, because it can be changed into a prime (85655827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5794 + ... + 14313.

It is an arithmetic number, because the mean of its divisors is an integer number (5067216).

Almost surely, 2^85655820 is an apocalyptic number.

It is an amenable number.

85655820 is an abundant number, since it is smaller than the sum of its proper divisors (157570548).

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

85655820 is a wasteful number, since it uses less digits than its factorization.

85655820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20190 (or 20188 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 39.

The square root of 85655820 is about 9255.0429496572. The cubic root of 85655820 is about 440.8108670107.

The spelling of 85655820 in words is "eighty-five million, six hundred fifty-five thousand, eight hundred twenty".