28890308 has 24 divisors (see below), whose sum is σ = 51565248. Its totient is φ = 14160416.

The previous prime is 28890307. The next prime is 28890311. The reversal of 28890308 is 80309882.

It is not an unprimeable number, because it can be changed into a prime (28890307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57185 + ... + 57687.

It is an arithmetic number, because the mean of its divisors is an integer number (2148552).

Almost surely, 2^28890308 is an apocalyptic number.

It is an amenable number.

28890308 is a deficient number, since it is larger than the sum of its proper divisors (22674940).

28890308 is a wasteful number, since it uses less digits than its factorization.

28890308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 28890308 is about 5374.9705115470. The cubic root of 28890308 is about 306.8438269570.

The spelling of 28890308 in words is "twenty-eight million, eight hundred ninety thousand, three hundred eight".