90208028 has 12 divisors (see below), whose sum is σ = 158480112. Its totient is φ = 44928000.

The previous prime is 90208021. The next prime is 90208031. The reversal of 90208028 is 82080209.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90208021) 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 3 ways as a sum of consecutive naturals, for example, 42848 + ... + 44903.

It is an arithmetic number, because the mean of its divisors is an integer number (13206676).

Almost surely, 2^90208028 is an apocalyptic number.

It is an amenable number.

90208028 is a deficient number, since it is larger than the sum of its proper divisors (68272084).

90208028 is a wasteful number, since it uses less digits than its factorization.

90208028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88012 (or 88010 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 90208028 is about 9497.7906904711. The cubic root of 90208028 is about 448.4854895843.

The spelling of 90208028 in words is "ninety million, two hundred eight thousand, twenty-eight".