28268646 has 16 divisors (see below), whose sum is σ = 64614144. Its totient is φ = 8076744.

The previous prime is 28268623. The next prime is 28268677. The reversal of 28268646 is 64686282.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 673063 = 28268646 / (2 + 8 + 2 + 6 + 8 + 6 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 28268598 and 28268607.

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, 336490 + ... + 336573.

It is an arithmetic number, because the mean of its divisors is an integer number (4038384).

Almost surely, 2^28268646 is an apocalyptic number.

28268646 is an abundant number, since it is smaller than the sum of its proper divisors (36345498).

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

28268646 is a wasteful number, since it uses less digits than its factorization.

28268646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673075.

The product of its digits is 221184, while the sum is 42.

The square root of 28268646 is about 5316.8266851572. The cubic root of 28268646 is about 304.6269594956.

The spelling of 28268646 in words is "twenty-eight million, two hundred sixty-eight thousand, six hundred forty-six".