90230280 has 128 divisors (see below), whose sum is σ = 311731200. Its totient is φ = 20466432.

The previous prime is 90230251. The next prime is 90230291. The reversal of 90230280 is 8203209.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 90230280.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136591 + ... + 137249.

It is an arithmetic number, because the mean of its divisors is an integer number (2435400).

Almost surely, 2^90230280 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 90230280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155865600).

90230280 is an abundant number, since it is smaller than the sum of its proper divisors (221500920).

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

90230280 is a wasteful number, since it uses less digits than its factorization.

90230280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 90230280 is about 9498.9620485609. The cubic root of 90230280 is about 448.5223631637.

Adding to 90230280 its reverse (8203209), we get a palindrome (98433489).

The spelling of 90230280 in words is "ninety million, two hundred thirty thousand, two hundred eighty".