90515998 has 16 divisors (see below), whose sum is σ = 138409920. Its totient is φ = 44388000.

The previous prime is 90515993. The next prime is 90516029. The reversal of 90515998 is 89951509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90515993) 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 in 7 ways as a sum of consecutive naturals, for example, 19963 + ... + 24073.

It is an arithmetic number, because the mean of its divisors is an integer number (8650620).

Almost surely, 2^90515998 is an apocalyptic number.

90515998 is a deficient number, since it is larger than the sum of its proper divisors (47893922).

90515998 is a wasteful number, since it uses less digits than its factorization.

90515998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323.

The product of its (nonzero) digits is 145800, while the sum is 46.

The square root of 90515998 is about 9513.9895942764. The cubic root of 90515998 is about 448.9952860189.

The spelling of 90515998 in words is "ninety million, five hundred fifteen thousand, nine hundred ninety-eight".