28799430 has 64 divisors (see below), whose sum is σ = 75955968. Its totient is φ = 6930560.

The previous prime is 28799429. The next prime is 28799447. The reversal of 28799430 is 3499782.

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, 64789 + ... + 65231.

It is an arithmetic number, because the mean of its divisors is an integer number (1186812).

Almost surely, 2^28799430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28799430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37977984).

28799430 is an abundant number, since it is smaller than the sum of its proper divisors (47156538).

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

28799430 is a wasteful number, since it uses less digits than its factorization.

28799430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 28799430 is about 5366.5100391223. The cubic root of 28799430 is about 306.5217507386.

The spelling of 28799430 in words is "twenty-eight million, seven hundred ninety-nine thousand, four hundred thirty".