85508772 has 12 divisors (see below), whose sum is σ = 199520496. Its totient is φ = 28502920.

The previous prime is 85508771. The next prime is 85508777. The reversal of 85508772 is 27780558.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (85508771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562854 + ... + 3562877.

It is an arithmetic number, because the mean of its divisors is an integer number (16626708).

Almost surely, 2^85508772 is an apocalyptic number.

It is an amenable number.

85508772 is an abundant number, since it is smaller than the sum of its proper divisors (114011724).

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

85508772 is a wasteful number, since it uses less digits than its factorization.

85508772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125738 (or 7125736 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 85508772 is about 9247.0953277232. The cubic root of 85508772 is about 440.5584712995.

The spelling of 85508772 in words is "eighty-five million, five hundred eight thousand, seven hundred seventy-two".