285079440 has 160 divisors (see below), whose sum is σ = 914227200. Its totient is φ = 73446912.

The previous prime is 285079433. The next prime is 285079453. The reversal of 285079440 is 44970582.

It is a super-2 number, since 2×285079440² = 162540574221427200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1432461 + ... + 1432659.

It is an arithmetic number, because the mean of its divisors is an integer number (5713920).

Almost surely, 2^285079440 is an apocalyptic number.

285079440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285079440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457113600).

285079440 is an abundant number, since it is smaller than the sum of its proper divisors (629147760).

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

285079440 is a wasteful number, since it uses less digits than its factorization.

285079440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 285079440 is about 16884.2956619457. The cubic root of 285079440 is about 658.1455749699.

The spelling of 285079440 in words is "two hundred eighty-five million, seventy-nine thousand, four hundred forty".