28347964 has 12 divisors (see below), whose sum is σ = 51319800. Its totient is φ = 13685168.

The previous prime is 28347931. The next prime is 28347967. The reversal of 28347964 is 46974382.

It is a self number, because there is not a number n which added to its sum of digits gives 28347964.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28347967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122074 + ... + 122305.

It is an arithmetic number, because the mean of its divisors is an integer number (4276650).

Almost surely, 2^28347964 is an apocalyptic number.

It is an amenable number.

28347964 is a deficient number, since it is larger than the sum of its proper divisors (22971836).

28347964 is a wasteful number, since it uses less digits than its factorization.

28347964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244412 (or 244410 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 28347964 is about 5324.2806086832. The cubic root of 28347964 is about 304.9116074588.

The spelling of 28347964 in words is "twenty-eight million, three hundred forty-seven thousand, nine hundred sixty-four".