172708992 has 48 divisors (see below), whose sum is σ = 496991430. Its totient is φ = 57569280.

The previous prime is 172708981. The next prime is 172708997. The reversal of 172708992 is 299807271.

It can be written as a sum of positive squares in only one way, i.e., 144576576 + 28132416 = 12024^2 + 5304^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (172708997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73809 + ... + 76112.

Almost surely, 2^172708992 is an apocalyptic number.

172708992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172708992 is an abundant number, since it is smaller than the sum of its proper divisors (324282438).

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

172708992 is a wasteful number, since it uses less digits than its factorization.

172708992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149941 (or 149926 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 172708992 is about 13141.8793176623. The cubic root of 172708992 is about 556.8928600574.

It can be divided in two parts, 17270 and 8992, that added together give a palindrome (26262).

The spelling of 172708992 in words is "one hundred seventy-two million, seven hundred eight thousand, nine hundred ninety-two".