172023880 has 64 divisors (see below), whose sum is σ = 443543040. Its totient is φ = 58820352.

The previous prime is 172023857. The next prime is 172023889. The reversal of 172023880 is 88320271.

It is not an unprimeable number, because it can be changed into a prime (172023889) 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, 155409 + ... + 156511.

It is an arithmetic number, because the mean of its divisors is an integer number (6930360).

Almost surely, 2^172023880 is an apocalyptic number.

172023880 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 172023880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221771520).

172023880 is an abundant number, since it is smaller than the sum of its proper divisors (271519160).

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

172023880 is a wasteful number, since it uses less digits than its factorization.

172023880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 172023880 is about 13115.7874334712. The cubic root of 172023880 is about 556.1555126299.

It can be divided in two parts, 1720 and 23880, that added together give a square (25600 = 160²).

The spelling of 172023880 in words is "one hundred seventy-two million, twenty-three thousand, eight hundred eighty".