285096640 has 28 divisors (see below), whose sum is σ = 678887136. Its totient is φ = 114038528.

The previous prime is 285096629. The next prime is 285096641. The reversal of 285096640 is 46690582.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 285096593 and 285096602.

It is not an unprimeable number, because it can be changed into a prime (285096641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445144 + ... + 445783.

Almost surely, 2^285096640 is an apocalyptic number.

285096640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285096640 is an abundant number, since it is smaller than the sum of its proper divisors (393790496).

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

285096640 is an equidigital number, since it uses as much as digits as its factorization.

285096640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890944 (or 890934 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 285096640 is about 16884.8050033159. The cubic root of 285096640 is about 658.1588109019.

The spelling of 285096640 in words is "two hundred eighty-five million, ninety-six thousand, six hundred forty".