285735890 has 64 divisors (see below), whose sum is σ = 574801920. Its totient is φ = 101400000.

The previous prime is 285735887. The next prime is 285735899. The reversal of 285735890 is 98537582.

It is not an unprimeable number, because it can be changed into a prime (285735899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1138265 + ... + 1138515.

It is an arithmetic number, because the mean of its divisors is an integer number (8981280).

Almost surely, 2^285735890 is an apocalyptic number.

285735890 is an abundant number, since it is smaller than the sum of its proper divisors (289066030).

285735890 is a wasteful number, since it uses less digits than its factorization.

285735890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479.

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 285735890 is about 16903.7241458798. The cubic root of 285735890 is about 658.6503564538.

The spelling of 285735890 in words is "two hundred eighty-five million, seven hundred thirty-five thousand, eight hundred ninety".