285257072 has 20 divisors (see below), whose sum is σ = 553073976. Its totient is φ = 142528320.

The previous prime is 285257069. The next prime is 285257083. The reversal of 285257072 is 270752582.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 20747 + ... + 31637.

Almost surely, 2^285257072 is an apocalyptic number.

It is an amenable number.

285257072 is a deficient number, since it is larger than the sum of its proper divisors (267816904).

285257072 is a wasteful number, since it uses less digits than its factorization.

285257072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12536 (or 12530 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 285257072 is about 16889.5551155144. Note that the first 3 decimals coincide. The cubic root of 285257072 is about 658.2822426552.

The spelling of 285257072 in words is "two hundred eighty-five million, two hundred fifty-seven thousand, seventy-two".