90890433 has 48 divisors (see below), whose sum is σ = 144967680. Its totient is φ = 54667872.

The previous prime is 90890407. The next prime is 90890453. The reversal of 90890433 is 33409809.

It is not a de Polignac number, because 90890433 - 2⁹ = 90889921 is a prime.

It is a super-2 number, since 2×90890433² = 16522141621854978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90890453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 345460 + ... + 345722.

It is an arithmetic number, because the mean of its divisors is an integer number (3020160).

Almost surely, 2^90890433 is an apocalyptic number.

It is an amenable number.

90890433 is a deficient number, since it is larger than the sum of its proper divisors (54077247).

90890433 is a wasteful number, since it uses less digits than its factorization.

90890433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 90890433 is about 9533.6474132412. The cubic root of 90890433 is about 449.6135497013.

The spelling of 90890433 in words is "ninety million, eight hundred ninety thousand, four hundred thirty-three".