172566940 has 96 divisors (see below), whose sum is σ = 454688640. Its totient is φ = 53554176.

The previous prime is 172566931. The next prime is 172566967. The reversal of 172566940 is 49665271.

It is a junction number, because it is equal to n+sod(n) for n = 172566893 and 172566902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95566 + ... + 97354.

It is an arithmetic number, because the mean of its divisors is an integer number (4736340).

Almost surely, 2^172566940 is an apocalyptic number.

172566940 is a gapful number since it is divisible by the number (10) 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 172566940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227344320).

172566940 is an abundant number, since it is smaller than the sum of its proper divisors (282121700).

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

172566940 is a wasteful number, since it uses less digits than its factorization.

172566940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871 (or 1869 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 172566940 is about 13136.4736516312. The cubic root of 172566940 is about 556.7401379513.

The spelling of 172566940 in words is "one hundred seventy-two million, five hundred sixty-six thousand, nine hundred forty".