285252920 has 16 divisors (see below), whose sum is σ = 641819160. Its totient is φ = 114101152.

The previous prime is 285252907. The next prime is 285252931. The reversal of 285252920 is 29252582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3565622 + ... + 3565701.

Almost surely, 2^285252920 is an apocalyptic number.

285252920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285252920 is an abundant number, since it is smaller than the sum of its proper divisors (356566240).

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

285252920 is a wasteful number, since it uses less digits than its factorization.

285252920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131334 (or 7131330 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 285252920 is about 16889.4321988633. The cubic root of 285252920 is about 658.2790488096.

The spelling of 285252920 in words is "two hundred eighty-five million, two hundred fifty-two thousand, nine hundred twenty".