285099090 has 16 divisors (see below), whose sum is σ = 684237888. Its totient is φ = 76026416.

The previous prime is 285099083. The next prime is 285099109. The reversal of 285099090 is 90990582.

It is a super-2 number, since 2×285099090² = 162562982237656200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4751622 + ... + 4751681.

It is an arithmetic number, because the mean of its divisors is an integer number (42764868).

Almost surely, 2^285099090 is an apocalyptic number.

285099090 is an abundant number, since it is smaller than the sum of its proper divisors (399138798).

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

285099090 is a wasteful number, since it uses less digits than its factorization.

285099090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9503313.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 285099090 is about 16884.8775535981. The cubic root of 285099090 is about 658.1606962093.

The spelling of 285099090 in words is "two hundred eighty-five million, ninety-nine thousand, ninety".