28305956 has 24 divisors (see below), whose sum is σ = 57051456. Its totient is φ = 12036960.

The previous prime is 28305947. The next prime is 28305971. The reversal of 28305956 is 65950382.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191 + ... + 7526.

It is an arithmetic number, because the mean of its divisors is an integer number (2377144).

Almost surely, 2^28305956 is an apocalyptic number.

It is an amenable number.

28305956 is an abundant number, since it is smaller than the sum of its proper divisors (28745500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28305956 is a wasteful number, since it uses less digits than its factorization.

28305956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7859 (or 7857 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 28305956 is about 5320.3342000292. The cubic root of 28305956 is about 304.7609198706.

The spelling of 28305956 in words is "twenty-eight million, three hundred five thousand, nine hundred fifty-six".