90002686 has 4 divisors (see below), whose sum is σ = 135004032. Its totient is φ = 45001342.

The previous prime is 90002681. The next prime is 90002699. The reversal of 90002686 is 68620009.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90002681) 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 as a sum of consecutive naturals, namely, 22500670 + ... + 22500673.

It is an arithmetic number, because the mean of its divisors is an integer number (33751008).

Almost surely, 2^90002686 is an apocalyptic number.

90002686 is a deficient number, since it is larger than the sum of its proper divisors (45001346).

90002686 is a wasteful number, since it uses less digits than its factorization.

90002686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45001345.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 90002686 is about 9486.9745440788. The cubic root of 90002686 is about 448.1449327792.

The spelling of 90002686 in words is "ninety million, two thousand, six hundred eighty-six".