285236394 has 32 divisors (see below), whose sum is σ = 597196800. Its totient is φ = 90711600.

The previous prime is 285236383. The next prime is 285236447. The reversal of 285236394 is 493632582.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2407 + ... + 24005.

It is an arithmetic number, because the mean of its divisors is an integer number (18662400).

Almost surely, 2^285236394 is an apocalyptic number.

285236394 is an abundant number, since it is smaller than the sum of its proper divisors (311960406).

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

285236394 is a wasteful number, since it uses less digits than its factorization.

285236394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21706.

The product of its digits is 311040, while the sum is 42.

The square root of 285236394 is about 16888.9429509369. The cubic root of 285236394 is about 658.2663361969.

The spelling of 285236394 in words is "two hundred eighty-five million, two hundred thirty-six thousand, three hundred ninety-four".