90218430 has 24 divisors (see below), whose sum is σ = 234568152. Its totient is φ = 24058224.

The previous prime is 90218413. The next prime is 90218459. The reversal of 90218430 is 3481209.

It is a super-2 number, since 2×90218430² = 16278730223329800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90218394 and 90218403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 501124 + ... + 501303.

It is an arithmetic number, because the mean of its divisors is an integer number (9773673).

Almost surely, 2^90218430 is an apocalyptic number.

90218430 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

90218430 is an abundant number, since it is smaller than the sum of its proper divisors (144349722).

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

90218430 is a wasteful number, since it uses less digits than its factorization.

90218430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002440 (or 1002437 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 90218430 is about 9498.3382757196. The cubic root of 90218430 is about 448.5027273951.

Adding to 90218430 its reverse (3481209), we get a palindrome (93699639).

The spelling of 90218430 in words is "ninety million, two hundred eighteen thousand, four hundred thirty".