90915898 has 16 divisors (see below), whose sum is σ = 144616104. Its totient is φ = 42718720.

The previous prime is 90915887. The next prime is 90915911. The reversal of 90915898 is 89851909.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 88491649 + 2424249 = 9407^2 + 1557^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 26286 + ... + 29542.

Almost surely, 2^90915898 is an apocalyptic number.

90915898 is a deficient number, since it is larger than the sum of its proper divisors (53700206).

90915898 is a wasteful number, since it uses less digits than its factorization.

90915898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097.

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 90915898 is about 9534.9828526327. The cubic root of 90915898 is about 449.6555355648.

It can be divided in two parts, 909 and 15898, that added together give a 5-th power (16807 = 7⁵).

The spelling of 90915898 in words is "ninety million, nine hundred fifteen thousand, eight hundred ninety-eight".