285087894 has 64 divisors (see below), whose sum is σ = 738716160. Its totient is φ = 71228160.

The previous prime is 285087839. The next prime is 285087899. The reversal of 285087894 is 498780582.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285087899) 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, 3367 + ... + 24114.

It is an arithmetic number, because the mean of its divisors is an integer number (11542440).

Almost surely, 2^285087894 is an apocalyptic number.

285087894 is an abundant number, since it is smaller than the sum of its proper divisors (453628266).

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

285087894 is a wasteful number, since it uses less digits than its factorization.

285087894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27525.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The square root of 285087894 is about 16884.5460110718. The cubic root of 285087894 is about 658.1520806509.

The spelling of 285087894 in words is "two hundred eighty-five million, eighty-seven thousand, eight hundred ninety-four".