90285443 has 4 divisors (see below), whose sum is σ = 90996480. Its totient is φ = 89574408.

The previous prime is 90285431. The next prime is 90285469. The reversal of 90285443 is 34458209.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90285443 - 2⁶ = 90285379 is a prime.

It is a super-2 number, since 2×90285443² = 16302922435412498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90282443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355328 + ... + 355581.

It is an arithmetic number, because the mean of its divisors is an integer number (22749120).

Almost surely, 2^90285443 is an apocalyptic number.

90285443 is a deficient number, since it is larger than the sum of its proper divisors (711037).

90285443 is a wasteful number, since it uses less digits than its factorization.

90285443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711036.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 90285443 is about 9501.8652379414. The cubic root of 90285443 is about 448.6137471159.

The spelling of 90285443 in words is "ninety million, two hundred eighty-five thousand, four hundred forty-three".