285272 has 24 divisors (see below), whose sum is σ = 581940. Its totient is φ = 131040.

The previous prime is 285251. The next prime is 285281. The reversal of 285272 is 272582.

It is a super-2 number, since 2×285272² = 162760227968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1247 + ... + 1457.

2²⁸⁵²⁷² 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 285272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290970).

285272 is an abundant number, since it is smaller than the sum of its proper divisors (296668).

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

285272 is a wasteful number, since it uses less digits than its factorization.

285272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 226 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 285272 is about 534.1086031885. The cubic root of 285272 is about 65.8293725474.

The spelling of 285272 in words is "two hundred eighty-five thousand, two hundred seventy-two".