404287506669172 has 72 divisors (see below), whose sum is σ = 831860964547200. Its totient is φ = 171408028934016.

The previous prime is 404287506669143. The next prime is 404287506669191. The reversal of 404287506669172 is 271966605782404.

It is a junction number, because it is equal to n+sod(n) for n = 404287506669098 and 404287506669107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1673104 + ... + 28484632.

It is an arithmetic number, because the mean of its divisors is an integer number (11553624507600).

Almost surely, 2^{404287506669172} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404287506669172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415930482273600).

404287506669172 is an abundant number, since it is smaller than the sum of its proper divisors (427573457878028).

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

404287506669172 is a wasteful number, since it uses less digits than its factorization.

404287506669172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26812373 (or 26812364 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 67.

The spelling of 404287506669172 in words is "four hundred four trillion, two hundred eighty-seven billion, five hundred six million, six hundred sixty-nine thousand, one hundred seventy-two".