99990285 has 16 divisors (see below), whose sum is σ = 162608640. Its totient is φ = 52453440.

The previous prime is 99990281. The next prime is 99990287. The reversal of 99990285 is 58209999.

It is not a de Polignac number, because 99990285 - 2² = 99990281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99990281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53725 + ... + 55554.

It is an arithmetic number, because the mean of its divisors is an integer number (10163040).

Almost surely, 2^99990285 is an apocalyptic number.

It is an amenable number.

99990285 is a deficient number, since it is larger than the sum of its proper divisors (62618355).

99990285 is a wasteful number, since it uses less digits than its factorization.

99990285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109348.

The product of its (nonzero) digits is 524880, while the sum is 51.

The square root of 99990285 is about 9999.5142382018. The cubic root of 99990285 is about 464.1438518627.

The spelling of 99990285 in words is "ninety-nine million, nine hundred ninety thousand, two hundred eighty-five".