28190430 has 64 divisors (see below), whose sum is σ = 76161600. Its totient is φ = 7511616.

The previous prime is 28190429. The next prime is 28190443. The reversal of 28190430 is 3409182.

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

It is a junction number, because it is equal to n+sod(n) for n = 28190394 and 28190403.

It is a congruent number.

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, 21226 + ... + 22514.

It is an arithmetic number, because the mean of its divisors is an integer number (1190025).

Almost surely, 2^28190430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28190430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38080800).

28190430 is an abundant number, since it is smaller than the sum of its proper divisors (47971170).

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

28190430 is an equidigital number, since it uses as much as digits as its factorization.

28190430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317 (or 1299 counting only the distinct ones).

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

The square root of 28190430 is about 5309.4660748516. The cubic root of 28190430 is about 304.3457443839.

The spelling of 28190430 in words is "twenty-eight million, one hundred ninety thousand, four hundred thirty".