28393564 has 6 divisors (see below), whose sum is σ = 49688744. Its totient is φ = 14196780.

The previous prime is 28393537. The next prime is 28393567. The reversal of 28393564 is 46539382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28393567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3549192 + ... + 3549199.

Almost surely, 2^28393564 is an apocalyptic number.

It is an amenable number.

28393564 is a deficient number, since it is larger than the sum of its proper divisors (21295180).

28393564 is a wasteful number, since it uses less digits than its factorization.

28393564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7098395 (or 7098393 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 28393564 is about 5328.5611566351. The cubic root of 28393564 is about 305.0750115600.

The spelling of 28393564 in words is "twenty-eight million, three hundred ninety-three thousand, five hundred sixty-four".