90638708 has 6 divisors (see below), whose sum is σ = 158617746. Its totient is φ = 45319352.

The previous prime is 90638707. The next prime is 90638719. The reversal of 90638708 is 80783609.

It can be written as a sum of positive squares in only one way, i.e., 69588964 + 21049744 = 8342^2 + 4588^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90638707) 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 as a sum of consecutive naturals, namely, 11329835 + ... + 11329842.

It is an arithmetic number, because the mean of its divisors is an integer number (26436291).

Almost surely, 2^90638708 is an apocalyptic number.

It is an amenable number.

90638708 is a deficient number, since it is larger than the sum of its proper divisors (67979038).

90638708 is a wasteful number, since it uses less digits than its factorization.

90638708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22659681 (or 22659679 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 90638708 is about 9520.4363345385. The cubic root of 90638708 is about 449.1980911732.

It can be divided in two parts, 9063 and 8708, that added together give a palindrome (17771).

The spelling of 90638708 in words is "ninety million, six hundred thirty-eight thousand, seven hundred eight".