285130240 has 80 divisors (see below), whose sum is σ = 689812992. Its totient is φ = 113025024.

The previous prime is 285130231. The next prime is 285130243. The reversal of 285130240 is 42031582.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285130243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324682 + ... + 325558.

Almost surely, 2^285130240 is an apocalyptic number.

285130240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285130240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344906496).

285130240 is an abundant number, since it is smaller than the sum of its proper divisors (404682752).

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

285130240 is an equidigital number, since it uses as much as digits as its factorization.

285130240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 285130240 is about 16885.7999514385. The cubic root of 285130240 is about 658.1846656054.

The spelling of 285130240 in words is "two hundred eighty-five million, one hundred thirty thousand, two hundred forty".