285998730 has 16 divisors (see below), whose sum is σ = 686397024. Its totient is φ = 76266320.

The previous prime is 285998729. The next prime is 285998731. The reversal of 285998730 is 37899582.

It is an interprime number because it is at equal distance from previous prime (285998729) and next prime (285998731).

It is a super-2 number, since 2×285998730² = 163590547123225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (285998731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4766616 + ... + 4766675.

It is an arithmetic number, because the mean of its divisors is an integer number (42899814).

Almost surely, 2^285998730 is an apocalyptic number.

285998730 is an abundant number, since it is smaller than the sum of its proper divisors (400398294).

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

285998730 is a wasteful number, since it uses less digits than its factorization.

285998730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9533301.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 285998730 is about 16911.4969769089. The cubic root of 285998730 is about 658.8522522257.

The spelling of 285998730 in words is "two hundred eighty-five million, nine hundred ninety-eight thousand, seven hundred thirty".