90028536 has 64 divisors (see below), whose sum is σ = 255158400. Its totient is φ = 26241408.

The previous prime is 90028507. The next prime is 90028537. The reversal of 90028536 is 63582009.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 90028497 and 90028506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90028537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1666 + ... + 13521.

It is an arithmetic number, because the mean of its divisors is an integer number (3986850).

Almost surely, 2^90028536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90028536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127579200).

90028536 is an abundant number, since it is smaller than the sum of its proper divisors (165129864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90028536 is a wasteful number, since it uses less digits than its factorization.

90028536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15228 (or 15224 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 90028536 is about 9488.3368405638. The cubic root of 90028536 is about 448.1878331196.

The spelling of 90028536 in words is "ninety million, twenty-eight thousand, five hundred thirty-six".