285198880 has 24 divisors (see below), whose sum is σ = 673782732. Its totient is φ = 114079488.

The previous prime is 285198871. The next prime is 285198929. The reversal of 285198880 is 88891582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 277822224 + 7376656 = 16668^2 + 2716^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

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, 891087 + ... + 891406.

Almost surely, 2^285198880 is an apocalyptic number.

285198880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285198880 is an abundant number, since it is smaller than the sum of its proper divisors (388583852).

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

285198880 is a wasteful number, since it uses less digits than its factorization.

285198880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782508 (or 1782500 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 49.

The square root of 285198880 is about 16887.8323061309. The cubic root of 285198880 is about 658.2374767590.

The spelling of 285198880 in words is "two hundred eighty-five million, one hundred ninety-eight thousand, eight hundred eighty".