28069956 has 24 divisors (see below), whose sum is σ = 72774240. Its totient is φ = 9356616.

The previous prime is 28069919. The next prime is 28069981. The reversal of 28069956 is 65996082.

It is a Smith number, since the sum of its digits (45) 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, 129846 + ... + 130061.

It is an arithmetic number, because the mean of its divisors is an integer number (3032260).

Almost surely, 2^28069956 is an apocalyptic number.

It is an amenable number.

28069956 is an abundant number, since it is smaller than the sum of its proper divisors (44704284).

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

28069956 is a wasteful number, since it uses less digits than its factorization.

28069956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259920 (or 259912 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 28069956 is about 5298.1087191563. The cubic root of 28069956 is about 303.9115768918.

The spelling of 28069956 in words is "twenty-eight million, sixty-nine thousand, nine hundred fifty-six".