28313828 has 12 divisors (see below), whose sum is σ = 51703680. Its totient is φ = 13541352.

The previous prime is 28313807. The next prime is 28313849. The reversal of 28313828 is 82831382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28313807) and next prime (28313849).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153788 + ... + 153971.

It is an arithmetic number, because the mean of its divisors is an integer number (4308640).

Almost surely, 2^28313828 is an apocalyptic number.

It is an amenable number.

28313828 is a deficient number, since it is larger than the sum of its proper divisors (23389852).

28313828 is a wasteful number, since it uses less digits than its factorization.

28313828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307786 (or 307784 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 28313828 is about 5321.0739517507. The cubic root of 28313828 is about 304.7891689972.

The spelling of 28313828 in words is "twenty-eight million, three hundred thirteen thousand, eight hundred twenty-eight".