285344940 has 48 divisors (see below), whose sum is σ = 799706880. Its totient is φ = 76021440.

The previous prime is 285344929. The next prime is 285344971. The reversal of 285344940 is 49443582.

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, 111475 + ... + 114005.

It is an arithmetic number, because the mean of its divisors is an integer number (16660560).

Almost surely, 2^285344940 is an apocalyptic number.

285344940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285344940 is an abundant number, since it is smaller than the sum of its proper divisors (514361940).

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

285344940 is a wasteful number, since it uses less digits than its factorization.

285344940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422 (or 4420 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 285344940 is about 16892.1561678786. The cubic root of 285344940 is about 658.3498261459.

The spelling of 285344940 in words is "two hundred eighty-five million, three hundred forty-four thousand, nine hundred forty".