28569276 has 18 divisors (see below), whose sum is σ = 72216872. Its totient is φ = 9523080.

The previous prime is 28569271. The next prime is 28569283. The reversal of 28569276 is 67296582.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28569271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396760 + ... + 396831.

Almost surely, 2^28569276 is an apocalyptic number.

It is an amenable number.

28569276 is an abundant number, since it is smaller than the sum of its proper divisors (43647596).

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

28569276 is a wasteful number, since it uses less digits than its factorization.

28569276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793601 (or 793596 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28569276 is about 5345.0234798362. The cubic root of 28569276 is about 305.7030311251.

The spelling of 28569276 in words is "twenty-eight million, five hundred sixty-nine thousand, two hundred seventy-six".