90228933 has 12 divisors (see below), whose sum is σ = 130437580. Its totient is φ = 60103296.

The previous prime is 90228917. The next prime is 90228959. The reversal of 90228933 is 33982209.

It can be written as a sum of positive squares in 2 ways, for example, as 63011844 + 27217089 = 7938^2 + 5217^2 .

It is not a de Polignac number, because 90228933 - 2⁴ = 90228917 is a prime.

It is a super-3 number, since 3×90228933³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90228913) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10035 + ... + 16767.

Almost surely, 2^90228933 is an apocalyptic number.

It is an amenable number.

90228933 is a deficient number, since it is larger than the sum of its proper divisors (40208647).

90228933 is a wasteful number, since it uses less digits than its factorization.

90228933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8228 (or 8225 counting only the distinct ones).

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

The square root of 90228933 is about 9498.8911458128. The cubic root of 90228933 is about 448.5201312351.

It can be divided in two parts, 9022 and 8933, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 90228933 in words is "ninety million, two hundred twenty-eight thousand, nine hundred thirty-three".