285229998 has 56 divisors (see below), whose sum is σ = 649478088. Its totient is φ = 93891312.

The previous prime is 285229937. The next prime is 285229999. The reversal of 285229998 is 899922582.

285229998 is a `hidden beast` number, since 28 + 522 + 9 + 9 + 98 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285229999) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 119836 + ... + 122192.

It is an arithmetic number, because the mean of its divisors is an integer number (11597823).

Almost surely, 2^285229998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285229998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324739044).

285229998 is an abundant number, since it is smaller than the sum of its proper divisors (364248090).

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

285229998 is an equidigital number, since it uses as much as digits as its factorization.

285229998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460 (or 2445 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 285229998 is about 16888.7535952183. The cubic root of 285229998 is about 658.2614159471.

The spelling of 285229998 in words is "two hundred eighty-five million, two hundred twenty-nine thousand, nine hundred ninety-eight".