90228537 has 24 divisors (see below), whose sum is σ = 157712256. Its totient is φ = 48525696.

The previous prime is 90228497. The next prime is 90228559. The reversal of 90228537 is 73582209.

It is a happy number.

It is not a de Polignac number, because 90228537 - 2¹¹ = 90226489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90228137) 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 23 ways as a sum of consecutive naturals, for example, 41053 + ... + 43194.

It is an arithmetic number, because the mean of its divisors is an integer number (6571344).

Almost surely, 2^90228537 is an apocalyptic number.

It is an amenable number.

90228537 is a deficient number, since it is larger than the sum of its proper divisors (67483719).

90228537 is a wasteful number, since it uses less digits than its factorization.

90228537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84277 (or 84274 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 90228537 is about 9498.8703012516. The cubic root of 90228537 is about 448.5194750737.

The spelling of 90228537 in words is "ninety million, two hundred twenty-eight thousand, five hundred thirty-seven".