90840838 has 8 divisors (see below), whose sum is σ = 148648680. Its totient is φ = 41291280.

The previous prime is 90840833. The next prime is 90840839. The reversal of 90840838 is 83804809.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90840838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90840833) 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 3 ways as a sum of consecutive naturals, for example, 2064543 + ... + 2064586.

It is an arithmetic number, because the mean of its divisors is an integer number (18581085).

Almost surely, 2^90840838 is an apocalyptic number.

90840838 is a deficient number, since it is larger than the sum of its proper divisors (57807842).

90840838 is a wasteful number, since it uses less digits than its factorization.

90840838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129142.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 90840838 is about 9531.0460076531. The cubic root of 90840838 is about 449.5317565639.

The spelling of 90840838 in words is "ninety million, eight hundred forty thousand, eight hundred thirty-eight".