90420875 has 24 divisors (see below), whose sum is σ = 119921568. Its totient is φ = 68054400.

The previous prime is 90420839. The next prime is 90420877. The reversal of 90420875 is 57802409.

It is a happy number.

It is not a de Polignac number, because 90420875 - 2¹⁰ = 90419851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90420877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34874 + ... + 37376.

It is an arithmetic number, because the mean of its divisors is an integer number (4996732).

Almost surely, 2^90420875 is an apocalyptic number.

90420875 is a deficient number, since it is larger than the sum of its proper divisors (29500693).

90420875 is a wasteful number, since it uses less digits than its factorization.

90420875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552 (or 2525 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 90420875 is about 9508.9891681503. The cubic root of 90420875 is about 448.8379482757.

The spelling of 90420875 in words is "ninety million, four hundred twenty thousand, eight hundred seventy-five".