28013308 has 6 divisors (see below), whose sum is σ = 49023296. Its totient is φ = 14006652.

The previous prime is 28013261. The next prime is 28013311. The reversal of 28013308 is 80331082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3501660 + ... + 3501667.

Almost surely, 2^28013308 is an apocalyptic number.

It is an amenable number.

28013308 is a deficient number, since it is larger than the sum of its proper divisors (21009988).

28013308 is a wasteful number, since it uses less digits than its factorization.

28013308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7003331 (or 7003329 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28013308 is about 5292.7599605499. The cubic root of 28013308 is about 303.7069978131.

The spelling of 28013308 in words is "twenty-eight million, thirteen thousand, three hundred eight".