90228369602 has 54 divisors (see below), whose sum is σ = 166265808057. Its totient is φ = 36611135568.

The previous prime is 90228369557. The next prime is 90228369607. The reversal of 90228369602 is 20696382209.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 81235830361 + 8992539241 = 285019^2 + 94829^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=212401.

It is not an unprimeable number, because it can be changed into a prime (90228369607) 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 26 ways as a sum of consecutive naturals, for example, 56497868 + ... + 56499464.

Almost surely, 2^90228369602 is an apocalyptic number.

90228369602 is a deficient number, since it is larger than the sum of its proper divisors (76037438455).

90228369602 is an equidigital number, since it uses as much as digits as its factorization.

90228369602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 90228369602 in words is "ninety billion, two hundred twenty-eight million, three hundred sixty-nine thousand, six hundred two".