28719306 has 64 divisors (see below), whose sum is σ = 79580160. Its totient is φ = 7458480.

The previous prime is 28719293. The next prime is 28719319. The reversal of 28719306 is 60391782.

It is an interprime number because it is at equal distance from previous prime (28719293) and next prime (28719319).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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, 705 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (1243440).

Almost surely, 2^28719306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28719306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39790080).

28719306 is an abundant number, since it is smaller than the sum of its proper divisors (50860854).

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

28719306 is a wasteful number, since it uses less digits than its factorization.

28719306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936 (or 6930 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 28719306 is about 5359.0396527736. The cubic root of 28719306 is about 306.2372247343.

The spelling of 28719306 in words is "twenty-eight million, seven hundred nineteen thousand, three hundred six".