90688442 has 24 divisors (see below), whose sum is σ = 149415840. Its totient is φ = 41255760.

The previous prime is 90688439. The next prime is 90688447. The reversal of 90688442 is 24488609.

It is a self number, because there is not a number n which added to its sum of digits gives 90688442.

It is not an unprimeable number, because it can be changed into a prime (90688447) 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 in 11 ways as a sum of consecutive naturals, for example, 22109 + ... + 25887.

It is an arithmetic number, because the mean of its divisors is an integer number (6225660).

Almost surely, 2^90688442 is an apocalyptic number.

90688442 is a deficient number, since it is larger than the sum of its proper divisors (58727398).

90688442 is a wasteful number, since it uses less digits than its factorization.

90688442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878 (or 3865 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 90688442 is about 9523.0479364540. The cubic root of 90688442 is about 449.2802353751.

The spelling of 90688442 in words is "ninety million, six hundred eighty-eight thousand, four hundred forty-two".