28430916 has 36 divisors (see below), whose sum is σ = 70024752. Its totient is φ = 8976816.

The previous prime is 28430873. The next prime is 28430929. The reversal of 28430916 is 61903482.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1051 + ... + 7613.

It is an arithmetic number, because the mean of its divisors is an integer number (1945132).

Almost surely, 2^28430916 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 28430916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35012376).

28430916 is an abundant number, since it is smaller than the sum of its proper divisors (41593836).

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

28430916 is a wasteful number, since it uses less digits than its factorization.

28430916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6608 (or 6587 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28430916 is about 5332.0648908279. The cubic root of 28430916 is about 305.2087292888.

The spelling of 28430916 in words is "twenty-eight million, four hundred thirty thousand, nine hundred sixteen".