285133442 has 16 divisors (see below), whose sum is σ = 469992672. Its totient is φ = 128658720.

The previous prime is 285133417. The next prime is 285133477. The reversal of 285133442 is 244331582.

It is a junction number, because it is equal to n+sod(n) for n = 285133399 and 285133408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44288 + ... + 50315.

It is an arithmetic number, because the mean of its divisors is an integer number (29374542).

Almost surely, 2^285133442 is an apocalyptic number.

285133442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

285133442 is a deficient number, since it is larger than the sum of its proper divisors (184859230).

285133442 is a wasteful number, since it uses less digits than its factorization.

285133442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94753.

The product of its digits is 23040, while the sum is 32.

The square root of 285133442 is about 16885.8947645661. The cubic root of 285133442 is about 658.1871293911.

The spelling of 285133442 in words is "two hundred eighty-five million, one hundred thirty-three thousand, four hundred forty-two".