90423216 has 120 divisors (see below), whose sum is σ = 282777040. Its totient is φ = 27806976.

The previous prime is 90423211. The next prime is 90423217. The reversal of 90423216 is 61232409.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 90423216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90423211) 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, 49650 + ... + 51438.

Almost surely, 2^90423216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90423216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141388520).

90423216 is an abundant number, since it is smaller than the sum of its proper divisors (192353824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90423216 is a wasteful number, since it uses less digits than its factorization.

90423216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825 (or 1807 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 90423216 is about 9509.1122614048. The cubic root of 90423216 is about 448.8418217197.

The spelling of 90423216 in words is "ninety million, four hundred twenty-three thousand, two hundred sixteen".