172004878 has 16 divisors (see below), whose sum is σ = 273493584. Its totient is φ = 80851840.

The previous prime is 172004873. The next prime is 172004909. The reversal of 172004878 is 878400271.

172004878 is a nontrivial binomial coefficient, being equal to C(18548, 2).

172004878 is a modest number, since divided by 4878 gives 1720 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172004873) 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, 34776 + ... + 39412.

It is an arithmetic number, because the mean of its divisors is an integer number (17093349).

Almost surely, 2^172004878 is an apocalyptic number.

172004878 is the 18547-th triangular number and also the 9274-th hexagonal number.

172004878 is the 6183-rd centered nonagonal number.

172004878 is a deficient number, since it is larger than the sum of its proper divisors (101488706).

172004878 is a wasteful number, since it uses less digits than its factorization.

172004878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 172004878 is about 13115.0630192920. The cubic root of 172004878 is about 556.1350339688.

The spelling of 172004878 in words is "one hundred seventy-two million, four thousand, eight hundred seventy-eight".