28670308 has 12 divisors (see below), whose sum is σ = 50238720. Its totient is φ = 14316392.

The previous prime is 28670303. The next prime is 28670311. The reversal of 28670308 is 80307682.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28670303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916 + ... + 7627.

It is an arithmetic number, because the mean of its divisors is an integer number (4186560).

Almost surely, 2^28670308 is an apocalyptic number.

It is an amenable number.

28670308 is a deficient number, since it is larger than the sum of its proper divisors (21568412).

28670308 is a wasteful number, since it uses less digits than its factorization.

28670308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9386 (or 9384 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28670308 is about 5354.4661732053. The cubic root of 28670308 is about 306.0629685158.

The spelling of 28670308 in words is "twenty-eight million, six hundred seventy thousand, three hundred eight".