172644472 has 64 divisors (see below), whose sum is σ = 434649600. Its totient is φ = 62087040.

The previous prime is 172644449. The next prime is 172644473. The reversal of 172644472 is 274446271.

It is a super-2 number, since 2×172644472² = 59612227424317568, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172644473) 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, 2772 + ... + 18787.

It is an arithmetic number, because the mean of its divisors is an integer number (6791400).

Almost surely, 2^172644472 is an apocalyptic number.

It is an amenable number.

172644472 is an abundant number, since it is smaller than the sum of its proper divisors (262005128).

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

172644472 is a wasteful number, since it uses less digits than its factorization.

172644472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21596 (or 21592 counting only the distinct ones).

The product of its digits is 75264, while the sum is 37.

The square root of 172644472 is about 13139.4243405105. The cubic root of 172644472 is about 556.8235040806.

It can be divided in two parts, 17264 and 4472, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 172644472 in words is "one hundred seventy-two million, six hundred forty-four thousand, four hundred seventy-two".