28396972 has 12 divisors (see below), whose sum is σ = 49785736. Its totient is φ = 14172480.

The previous prime is 28396967. The next prime is 28396981. The reversal of 28396972 is 27969382.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3933 + ... + 8500.

Almost surely, 2^28396972 is an apocalyptic number.

It is an amenable number.

28396972 is a deficient number, since it is larger than the sum of its proper divisors (21388764).

28396972 is a wasteful number, since it uses less digits than its factorization.

28396972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13008 (or 13006 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 28396972 is about 5328.8809331791. The cubic root of 28396972 is about 305.0872168383.

The spelling of 28396972 in words is "twenty-eight million, three hundred ninety-six thousand, nine hundred seventy-two".