90998378 has 16 divisors (see below), whose sum is σ = 138710880. Its totient is φ = 44766096.

The previous prime is 90998377. The next prime is 90998389. The reversal of 90998378 is 87389909.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90998377) 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, 44993 + ... + 46971.

It is an arithmetic number, because the mean of its divisors is an integer number (8669430).

Almost surely, 2^90998378 is an apocalyptic number.

90998378 is a deficient number, since it is larger than the sum of its proper divisors (47712502).

90998378 is a wasteful number, since it uses less digits than its factorization.

90998378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 90998378 is about 9539.3069978904. The cubic root of 90998378 is about 449.7914721084.

The spelling of 90998378 in words is "ninety million, nine hundred ninety-eight thousand, three hundred seventy-eight".