85721764 has 12 divisors (see below), whose sum is σ = 150137344. Its totient is φ = 42825384.

The previous prime is 85721737. The next prime is 85721777. The reversal of 85721764 is 46712758.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3012 + ... + 13435.

Almost surely, 2^85721764 is an apocalyptic number.

It is an amenable number.

85721764 is a deficient number, since it is larger than the sum of its proper divisors (64415580).

85721764 is a wasteful number, since it uses less digits than its factorization.

85721764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17754 (or 17752 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 85721764 is about 9258.6048625049. The cubic root of 85721764 is about 440.9239606112.

The spelling of 85721764 in words is "eighty-five million, seven hundred twenty-one thousand, seven hundred sixty-four".