172372992 has 88 divisors (see below), whose sum is σ = 501302112. Its totient is φ = 52224000.

The previous prime is 172372961. The next prime is 172372999. The reversal of 172372992 is 299273271.

It is a tau number, because it is divible by the number of its divisors (88).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172372999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31242 + ... + 36342.

Almost surely, 2^172372992 is an apocalyptic number.

172372992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172372992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250651056).

172372992 is an abundant number, since it is smaller than the sum of its proper divisors (328929120).

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

172372992 is a wasteful number, since it uses less digits than its factorization.

172372992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135 (or 5117 counting only the distinct ones).

The product of its digits is 95256, while the sum is 42.

The square root of 172372992 is about 13129.0895343127. The cubic root of 172372992 is about 556.5314863329.

The spelling of 172372992 in words is "one hundred seventy-two million, three hundred seventy-two thousand, nine hundred ninety-two".