28668748 has 6 divisors (see below), whose sum is σ = 50170316. Its totient is φ = 14334372.

The previous prime is 28668743. The next prime is 28668751. The reversal of 28668748 is 84786682.

It is a super-2 number, since 2×28668748² = 1643794223775008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28668743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3583590 + ... + 3583597.

Almost surely, 2^28668748 is an apocalyptic number.

It is an amenable number.

28668748 is a deficient number, since it is larger than the sum of its proper divisors (21501568).

28668748 is a wasteful number, since it uses less digits than its factorization.

28668748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167191 (or 7167189 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 28668748 is about 5354.3204984386. The cubic root of 28668748 is about 306.0574172804.

The spelling of 28668748 in words is "twenty-eight million, six hundred sixty-eight thousand, seven hundred forty-eight".