285681172 has 36 divisors (see below), whose sum is σ = 583982784. Its totient is φ = 121926000.

The previous prime is 285681167. The next prime is 285681173. The reversal of 285681172 is 271186582.

It is a super-2 number, since 2×285681172² = 163227464070587168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285681173) 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, 46293 + ... + 52099.

It is an arithmetic number, because the mean of its divisors is an integer number (16221744).

Almost surely, 2^285681172 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 285681172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291991392).

285681172 is an abundant number, since it is smaller than the sum of its proper divisors (298301612).

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

285681172 is a wasteful number, since it uses less digits than its factorization.

285681172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6076 (or 6067 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The square root of 285681172 is about 16902.1055493095. The cubic root of 285681172 is about 658.6083102469.

The spelling of 285681172 in words is "two hundred eighty-five million, six hundred eighty-one thousand, one hundred seventy-two".