285632890 has 32 divisors (see below), whose sum is σ = 559872000. Its totient is φ = 104505408.

The previous prime is 285632881. The next prime is 285632891. The reversal of 285632890 is 98236582.

It is a super-2 number, since 2×285632890² = 163172295699504200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (285632891) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20410 + ... + 31429.

It is an arithmetic number, because the mean of its divisors is an integer number (17496000).

Almost surely, 2^285632890 is an apocalyptic number.

285632890 is a deficient number, since it is larger than the sum of its proper divisors (274239110).

285632890 is a wasteful number, since it uses less digits than its factorization.

285632890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51894.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 285632890 is about 16900.6772053667. The cubic root of 285632890 is about 658.5712051088.

The spelling of 285632890 in words is "two hundred eighty-five million, six hundred thirty-two thousand, eight hundred ninety".