285864390 has 80 divisors (see below), whose sum is σ = 878483232. Its totient is φ = 65339136.

The previous prime is 285864379. The next prime is 285864407. The reversal of 285864390 is 93468582.

285864390 is a `hidden beast` number, since 28 + 586 + 43 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19539 + ... + 30878.

Almost surely, 2^285864390 is an apocalyptic number.

285864390 is an abundant number, since it is smaller than the sum of its proper divisors (592618842).

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

285864390 is a wasteful number, since it uses less digits than its factorization.

285864390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50443 (or 50434 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 285864390 is about 16907.5246561997. The cubic root of 285864390 is about 658.7490768566.

The spelling of 285864390 in words is "two hundred eighty-five million, eight hundred sixty-four thousand, three hundred ninety".