172004072 has 8 divisors (see below), whose sum is σ = 322507650. Its totient is φ = 86002032.

The previous prime is 172004059. The next prime is 172004087. The reversal of 172004072 is 270400271.

It can be written as a sum of positive squares in only one way, i.e., 137968516 + 34035556 = 11746^2 + 5834^2 .

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, 10750247 + ... + 10750262.

Almost surely, 2^172004072 is an apocalyptic number.

It is an amenable number.

172004072 is a deficient number, since it is larger than the sum of its proper divisors (150503578).

172004072 is a wasteful number, since it uses less digits than its factorization.

172004072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21500515 (or 21500511 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 172004072 is about 13115.0322912298. The cubic root of 172004072 is about 556.1341653005.

The spelling of 172004072 in words is "one hundred seventy-two million, four thousand, seventy-two".