90205512 has 32 divisors (see below), whose sum is σ = 226670400. Its totient is φ = 29914304.

The previous prime is 90205501. The next prime is 90205541. The reversal of 90205512 is 21550209.

It is a super-3 number, since 3×90205512³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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, 4812 + ... + 14267.

It is an arithmetic number, because the mean of its divisors is an integer number (7083450).

Almost surely, 2^90205512 is an apocalyptic number.

It is an amenable number.

90205512 is an abundant number, since it is smaller than the sum of its proper divisors (136464888).

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

90205512 is a wasteful number, since it uses less digits than its factorization.

90205512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19285 (or 19281 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 90205512 is about 9497.6582376921. The cubic root of 90205512 is about 448.4813199629.

The spelling of 90205512 in words is "ninety million, two hundred five thousand, five hundred twelve".