90857216 has 18 divisors (see below), whose sum is σ = 181360032. Its totient is φ = 45428480.

The previous prime is 90857213. The next prime is 90857219. The reversal of 90857216 is 61275809.

It is an interprime number because it is at equal distance from previous prime (90857213) and next prime (90857219).

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 90857216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90857213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177200 + ... + 177711.

Almost surely, 2^90857216 is an apocalyptic number.

It is an amenable number.

90857216 is a deficient number, since it is larger than the sum of its proper divisors (90502816).

90857216 is an equidigital number, since it uses as much as digits as its factorization.

90857216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354927 (or 354913 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 90857216 is about 9531.9051610893. The cubic root of 90857216 is about 449.5587708042.

The spelling of 90857216 in words is "ninety million, eight hundred fifty-seven thousand, two hundred sixteen".