285343290 has 64 divisors (see below), whose sum is σ = 794016000. Its totient is φ = 72781632.

The previous prime is 285343243. The next prime is 285343291. The reversal of 285343290 is 92343582.

285343290 is a `hidden beast` number, since 2 + 8 + 534 + 32 + 90 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (285343291) 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, 16765 + ... + 29184.

It is an arithmetic number, because the mean of its divisors is an integer number (12406500).

Almost surely, 2^285343290 is an apocalyptic number.

285343290 is an abundant number, since it is smaller than the sum of its proper divisors (508672710).

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

285343290 is a wasteful number, since it uses less digits than its factorization.

285343290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45988 (or 45982 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 285343290 is about 16892.1073285721. The cubic root of 285343290 is about 658.3485571797.

The spelling of 285343290 in words is "two hundred eighty-five million, three hundred forty-three thousand, two hundred ninety".