28037668 has 12 divisors (see below), whose sum is σ = 49441392. Its totient is φ = 13911560.

The previous prime is 28037657. The next prime is 28037683. The reversal of 28037668 is 86673082.

It is a happy number.

It is a super-2 number, since 2×28037668² = 1572221653756448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28037668.

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, 26230 + ... + 27277.

It is an arithmetic number, because the mean of its divisors is an integer number (4120116).

Almost surely, 2^28037668 is an apocalyptic number.

It is an amenable number.

28037668 is a deficient number, since it is larger than the sum of its proper divisors (21403724).

28037668 is a wasteful number, since it uses less digits than its factorization.

28037668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53642 (or 53640 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28037668 is about 5295.0607173100. The cubic root of 28037668 is about 303.7950054964.

The spelling of 28037668 in words is "twenty-eight million, thirty-seven thousand, six hundred sixty-eight".