285245442 has 32 divisors (see below), whose sum is σ = 667243200. Its totient is φ = 90077184.

The previous prime is 285245413. The next prime is 285245447. The reversal of 285245442 is 244542582.

It is a junction number, because it is equal to n+sod(n) for n = 285245397 and 285245406.

It is not an unprimeable number, because it can be changed into a prime (285245447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137983 + ... + 140034.

It is an arithmetic number, because the mean of its divisors is an integer number (20851350).

Almost surely, 2^285245442 is an apocalyptic number.

285245442 is an abundant number, since it is smaller than the sum of its proper divisors (381997758).

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

285245442 is a wasteful number, since it uses less digits than its factorization.

285245442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278047 (or 278041 counting only the distinct ones).

The product of its digits is 102400, while the sum is 36.

The square root of 285245442 is about 16889.2108163762. The cubic root of 285245442 is about 658.2732964247.

The spelling of 285245442 in words is "two hundred eighty-five million, two hundred forty-five thousand, four hundred forty-two".