28793310 has 128 divisors (see below), whose sum is σ = 87091200. Its totient is φ = 5930496.

The previous prime is 28793293. The next prime is 28793311. The reversal of 28793310 is 1339782.

It is a super-2 number, since 2×28793310² = 1658109401512200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28793311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 144591 + ... + 144789.

It is an arithmetic number, because the mean of its divisors is an integer number (680400).

Almost surely, 2^28793310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28793310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43545600).

28793310 is an abundant number, since it is smaller than the sum of its proper divisors (58297890).

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

28793310 is a wasteful number, since it uses less digits than its factorization.

28793310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 28793310 is about 5365.9398058495. The cubic root of 28793310 is about 306.5000368134.

The spelling of 28793310 in words is "twenty-eight million, seven hundred ninety-three thousand, three hundred ten".