285439000 has 192 divisors, whose sum is σ = 841538880. Its totient is φ = 88704000.

The previous prime is 285438997. The next prime is 285439003. The reversal of 285439000 is 934582.

It is an interprime number because it is at equal distance from previous prime (285438997) and next prime (285439003).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285439003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 846832 + ... + 847168.

It is an arithmetic number, because the mean of its divisors is an integer number (4383015).

Almost surely, 2^285439000 is an apocalyptic number.

285439000 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 285439000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420769440).

285439000 is an abundant number, since it is smaller than the sum of its proper divisors (556099880).

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

285439000 is a wasteful number, since it uses less digits than its factorization.

285439000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 285439000 is about 16894.9400709206. The cubic root of 285439000 is about 658.4221568272.

The spelling of 285439000 in words is "two hundred eighty-five million, four hundred thirty-nine thousand".