285874580 has 72 divisors (see below), whose sum is σ = 631833048. Its totient is φ = 108605952.

The previous prime is 285874573. The next prime is 285874583. The reversal of 285874580 is 85478582.

It can be written as a sum of positive squares in 12 ways, for example, as 49084036 + 236790544 = 7006^2 + 15388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285874583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1451042 + ... + 1451238.

It is an arithmetic number, because the mean of its divisors is an integer number (8775459).

Almost surely, 2^285874580 is an apocalyptic number.

285874580 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 285874580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315916524).

285874580 is an abundant number, since it is smaller than the sum of its proper divisors (345958468).

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

285874580 is a wasteful number, since it uses less digits than its factorization.

285874580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 47.

The square root of 285874580 is about 16907.8259986315. The cubic root of 285874580 is about 658.7569040800.

The spelling of 285874580 in words is "two hundred eighty-five million, eight hundred seventy-four thousand, five hundred eighty".