28578364 has 6 divisors (see below), whose sum is σ = 50012144. Its totient is φ = 14289180.

The previous prime is 28578313. The next prime is 28578371. The reversal of 28578364 is 46387582.

It is a self number, because there is not a number n which added to its sum of digits gives 28578364.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3572292 + ... + 3572299.

Almost surely, 2^28578364 is an apocalyptic number.

It is an amenable number.

28578364 is a deficient number, since it is larger than the sum of its proper divisors (21433780).

28578364 is a wasteful number, since it uses less digits than its factorization.

28578364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7144595 (or 7144593 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 28578364 is about 5345.8735488225. The cubic root of 28578364 is about 305.7354428042.

The spelling of 28578364 in words is "twenty-eight million, five hundred seventy-eight thousand, three hundred sixty-four".