285885240 has 32 divisors (see below), whose sum is σ = 857656080. Its totient is φ = 76236032.

The previous prime is 285885179. The next prime is 285885253. The reversal of 285885240 is 42588582.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 285885192 and 285885201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1191069 + ... + 1191308.

Almost surely, 2^285885240 is an apocalyptic number.

285885240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285885240 is an abundant number, since it is smaller than the sum of its proper divisors (571770840).

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

285885240 is a wasteful number, since it uses less digits than its factorization.

285885240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382391 (or 2382387 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 42.

The square root of 285885240 is about 16908.1412343285. The cubic root of 285885240 is about 658.7650921245.

The spelling of 285885240 in words is "two hundred eighty-five million, eight hundred eighty-five thousand, two hundred forty".