285700040 has 16 divisors (see below), whose sum is σ = 642825180. Its totient is φ = 114280000.

The previous prime is 285700031. The next prime is 285700067. The reversal of 285700040 is 40007582.

It can be written as a sum of positive squares in 2 ways, for example, as 283383556 + 2316484 = 16834^2 + 1522^2 .

It is a junction number, because it is equal to n+sod(n) for n = 285699982 and 285700009.

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, 3571211 + ... + 3571290.

Almost surely, 2^285700040 is an apocalyptic number.

285700040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285700040 is an abundant number, since it is smaller than the sum of its proper divisors (357125140).

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

285700040 is a wasteful number, since it uses less digits than its factorization.

285700040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7142512 (or 7142508 counting only the distinct ones).

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

The square root of 285700040 is about 16902.6636954061. The cubic root of 285700040 is about 658.6228093334.

The spelling of 285700040 in words is "two hundred eighty-five million, seven hundred thousand, forty".