172152780 has 24 divisors (see below), whose sum is σ = 482027952. Its totient is φ = 45907392.

The previous prime is 172152767. The next prime is 172152781. The reversal of 172152780 is 87251271.

172152780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172152781) 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, 1434547 + ... + 1434666.

It is an arithmetic number, because the mean of its divisors is an integer number (20084498).

Almost surely, 2^172152780 is an apocalyptic number.

172152780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172152780 is an abundant number, since it is smaller than the sum of its proper divisors (309875172).

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

172152780 is a wasteful number, since it uses less digits than its factorization.

172152780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869225 (or 2869223 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 172152780 is about 13120.7004386199. The cubic root of 172152780 is about 556.2943897580.

The spelling of 172152780 in words is "one hundred seventy-two million, one hundred fifty-two thousand, seven hundred eighty".