90645594 has 32 divisors (see below), whose sum is σ = 198555840. Its totient is φ = 27416832.

The previous prime is 90645593. The next prime is 90645617. The reversal of 90645594 is 49554609.

It is a happy number.

It is a super-2 number, since 2×90645594² = 16433247423225672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90645593) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5247 + ... + 14450.

It is an arithmetic number, because the mean of its divisors is an integer number (6204870).

Almost surely, 2^90645594 is an apocalyptic number.

90645594 is an abundant number, since it is smaller than the sum of its proper divisors (107910246).

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

90645594 is a wasteful number, since it uses less digits than its factorization.

90645594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19774.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 90645594 is about 9520.7979707585. The cubic root of 90645594 is about 449.2094663711.

The spelling of 90645594 in words is "ninety million, six hundred forty-five thousand, five hundred ninety-four".