864020172 has 48 divisors (see below), whose sum is σ = 2138209920. Its totient is φ = 270611712.

The previous prime is 864020167. The next prime is 864020173. The reversal of 864020172 is 271020468.

It is not an unprimeable number, because it can be changed into a prime (864020173) 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, 131223 + ... + 137649.

It is an arithmetic number, because the mean of its divisors is an integer number (44546040).

Almost surely, 2^864020172 is an apocalyptic number.

It is an amenable number.

864020172 is an abundant number, since it is smaller than the sum of its proper divisors (1274189748).

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

864020172 is a wasteful number, since it uses less digits than its factorization.

864020172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110 (or 7108 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 864020172 is about 29394.2200440835. The cubic root of 864020172 is about 952.4480434043.

The spelling of 864020172 in words is "eight hundred sixty-four million, twenty thousand, one hundred seventy-two".