28430430 has 64 divisors (see below), whose sum is σ = 80110080. Its totient is φ = 6321024.

The previous prime is 28430417. The next prime is 28430471. The reversal of 28430430 is 3403482.

It is a self number, because there is not a number n which added to its sum of digits gives 28430430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5941 + ... + 9599.

It is an arithmetic number, because the mean of its divisors is an integer number (1251720).

Almost surely, 2^28430430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28430430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40055040).

28430430 is an abundant number, since it is smaller than the sum of its proper divisors (51679650).

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

28430430 is a wasteful number, since it uses less digits than its factorization.

28430430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 28430430 is about 5332.0193172943. The cubic root of 28430430 is about 305.2069901926.

The spelling of 28430430 in words is "twenty-eight million, four hundred thirty thousand, four hundred thirty".