172042884 has 36 divisors (see below), whose sum is σ = 468340236. Its totient is φ = 52936128.

The previous prime is 172042883. The next prime is 172042903. The reversal of 172042884 is 488240271.

It can be written as a sum of positive squares in 2 ways, for example, as 17040384 + 155002500 = 4128^2 + 12450^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (172042883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183339 + ... + 184274.

It is an arithmetic number, because the mean of its divisors is an integer number (13009451).

Almost surely, 2^172042884 is an apocalyptic number.

It is an amenable number.

172042884 is an abundant number, since it is smaller than the sum of its proper divisors (296297352).

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

172042884 is a wasteful number, since it uses less digits than its factorization.

172042884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367636 (or 367631 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 172042884 is about 13116.5118838813. The cubic root of 172042884 is about 556.1759919381.

The spelling of 172042884 in words is "one hundred seventy-two million, forty-two thousand, eight hundred eighty-four".