90015802 has 4 divisors (see below), whose sum is σ = 135023706. Its totient is φ = 45007900.

The previous prime is 90015743. The next prime is 90015803. The reversal of 90015802 is 20851009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20851009 = 89 ⋅234281.

It can be written as a sum of positive squares in only one way, i.e., 64016001 + 25999801 = 8001^2 + 5099^2 .

It is not an unprimeable number, because it can be changed into a prime (90015803) 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, 22503949 + ... + 22503952.

Almost surely, 2^90015802 is an apocalyptic number.

90015802 is a deficient number, since it is larger than the sum of its proper divisors (45007904).

90015802 is a wasteful number, since it uses less digits than its factorization.

90015802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45007903.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 90015802 is about 9487.6657824778. The cubic root of 90015802 is about 448.1667009571.

The spelling of 90015802 in words is "ninety million, fifteen thousand, eight hundred two".