85720964 has 12 divisors (see below), whose sum is σ = 171441984. Its totient is φ = 36737544.

The previous prime is 85720963. The next prime is 85720967. The reversal of 85720964 is 46902758.

85720964 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (85720963) 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, 1530704 + ... + 1530759.

It is an arithmetic number, because the mean of its divisors is an integer number (14286832).

Almost surely, 2^85720964 is an apocalyptic number.

It is an amenable number.

85720964 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

85720964 is a wasteful number, since it uses less digits than its factorization.

85720964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061474 (or 3061472 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 85720964 is about 9258.5616593508. The cubic root of 85720964 is about 440.9225889632.

The spelling of 85720964 in words is "eighty-five million, seven hundred twenty thousand, nine hundred sixty-four".