28664310 has 16 divisors (see below), whose sum is σ = 68794416. Its totient is φ = 7643808.

The previous prime is 28664309. The next prime is 28664341. The reversal of 28664310 is 1346682.

It is a super-2 number, since 2×28664310² = 1643285335552200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 955477 = 28664310 / (2 + 8 + 6 + 6 + 4 + 3 + 1 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477709 + ... + 477768.

It is an arithmetic number, because the mean of its divisors is an integer number (4299651).

Almost surely, 2^28664310 is an apocalyptic number.

28664310 is an abundant number, since it is smaller than the sum of its proper divisors (40130106).

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

28664310 is a wasteful number, since it uses less digits than its factorization.

28664310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955487.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 28664310 is about 5353.9060507260. The cubic root of 28664310 is about 306.0416236258.

The spelling of 28664310 in words is "twenty-eight million, six hundred sixty-four thousand, three hundred ten".