172700072 has 8 divisors (see below), whose sum is σ = 323812650. Its totient is φ = 86350032.

The previous prime is 172700057. The next prime is 172700081. The reversal of 172700072 is 270007271.

It can be written as a sum of positive squares in only one way, i.e., 165225316 + 7474756 = 12854^2 + 2734^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10793747 + ... + 10793762.

Almost surely, 2^172700072 is an apocalyptic number.

It is an amenable number.

172700072 is a deficient number, since it is larger than the sum of its proper divisors (151112578).

172700072 is a wasteful number, since it uses less digits than its factorization.

172700072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21587515 (or 21587511 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 172700072 is about 13141.5399402049. The cubic root of 172700072 is about 556.8832725045.

The spelling of 172700072 in words is "one hundred seventy-two million, seven hundred thousand, seventy-two".