285207050172 has 48 divisors (see below), whose sum is σ = 751015440000. Its totient is φ = 83446157760.

The previous prime is 285207050153. The next prime is 285207050203. The reversal of 285207050172 is 271050702582.

It is a super-2 number, since 2×285207050172² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 285207050172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37248922 + ... + 37256577.

It is an arithmetic number, because the mean of its divisors is an integer number (15646155000).

Almost surely, 2^285207050172 is an apocalyptic number.

285207050172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

285207050172 is an abundant number, since it is smaller than the sum of its proper divisors (465808389828).

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

285207050172 is a wasteful number, since it uses less digits than its factorization.

285207050172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74505546 (or 74505544 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 39.

The spelling of 285207050172 in words is "two hundred eighty-five billion, two hundred seven million, fifty thousand, one hundred seventy-two".