84723720 has 64 divisors (see below), whose sum is σ = 265230720. Its totient is φ = 21609984.

The previous prime is 84723707. The next prime is 84723731. The reversal of 84723720 is 2732748.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12589 + ... + 18108.

It is an arithmetic number, because the mean of its divisors is an integer number (4144230).

Almost surely, 2^84723720 is an apocalyptic number.

It is an amenable number.

84723720 is an abundant number, since it is smaller than the sum of its proper divisors (180507000).

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

84723720 is a wasteful number, since it uses less digits than its factorization.

84723720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30734 (or 30730 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 84723720 is about 9204.5488754202. The cubic root of 84723720 is about 439.2060752110.

The spelling of 84723720 in words is "eighty-four million, seven hundred twenty-three thousand, seven hundred twenty".