90238255 has 4 divisors (see below), whose sum is σ = 108285912. Its totient is φ = 72190600.

The previous prime is 90238243. The next prime is 90238273. The reversal of 90238255 is 55283209.

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

It is a de Polignac number, because none of the positive numbers 2^k-90238255 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90238255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9023821 + ... + 9023830.

It is an arithmetic number, because the mean of its divisors is an integer number (27071478).

Almost surely, 2^90238255 is an apocalyptic number.

90238255 is a deficient number, since it is larger than the sum of its proper divisors (18047657).

90238255 is a wasteful number, since it uses less digits than its factorization.

90238255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18047656.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 90238255 is about 9499.3818219924. The cubic root of 90238255 is about 448.5355769853.

The spelling of 90238255 in words is "ninety million, two hundred thirty-eight thousand, two hundred fifty-five".