90191202 has 16 divisors (see below), whose sum is σ = 180485280. Its totient is φ = 30046592.

The previous prime is 90191201. The next prime is 90191249. The reversal of 90191202 is 20219109.

It is not an unprimeable number, because it can be changed into a prime (90191201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11698 + ... + 17810.

It is an arithmetic number, because the mean of its divisors is an integer number (11280330).

Almost surely, 2^90191202 is an apocalyptic number.

90191202 is an abundant number, since it is smaller than the sum of its proper divisors (90294078).

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

90191202 is a wasteful number, since it uses less digits than its factorization.

90191202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8577.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 90191202 is about 9496.9048642176. The cubic root of 90191202 is about 448.4576033520.

The spelling of 90191202 in words is "ninety million, one hundred ninety-one thousand, two hundred two".