28211308 has 6 divisors (see below), whose sum is σ = 49369796. Its totient is φ = 14105652.

The previous prime is 28211303. The next prime is 28211377. The reversal of 28211308 is 80311282.

It is not an unprimeable number, because it can be changed into a prime (28211303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3526410 + ... + 3526417.

Almost surely, 2^28211308 is an apocalyptic number.

It is an amenable number.

28211308 is a deficient number, since it is larger than the sum of its proper divisors (21158488).

28211308 is a wasteful number, since it uses less digits than its factorization.

28211308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7052831 (or 7052829 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 28211308 is about 5311.4318220231. The cubic root of 28211308 is about 304.4208592658.

The spelling of 28211308 in words is "twenty-eight million, two hundred eleven thousand, three hundred eight".