90303688 has 8 divisors (see below), whose sum is σ = 169319430. Its totient is φ = 45151840.

The previous prime is 90303649. The next prime is 90303691. The reversal of 90303688 is 88630309.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 53846244 + 36457444 = 7338^2 + 6038^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5643973 + ... + 5643988.

Almost surely, 2^90303688 is an apocalyptic number.

It is an amenable number.

90303688 is a deficient number, since it is larger than the sum of its proper divisors (79015742).

90303688 is a wasteful number, since it uses less digits than its factorization.

90303688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11287967 (or 11287963 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 90303688 is about 9502.8252640991. The cubic root of 90303688 is about 448.6439638975.

The spelling of 90303688 in words is "ninety million, three hundred three thousand, six hundred eighty-eight".