28566378 has 16 divisors (see below), whose sum is σ = 63480960. Its totient is φ = 9522108.

The previous prime is 28566371. The next prime is 28566383. The reversal of 28566378 is 87366582.

28566378 is a `hidden beast` number, since 2 + 8 + 5 + 6 + 637 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (28566371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264450 + ... + 264557.

It is an arithmetic number, because the mean of its divisors is an integer number (3967560).

Almost surely, 2^28566378 is an apocalyptic number.

28566378 is an abundant number, since it is smaller than the sum of its proper divisors (34914582).

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

28566378 is a wasteful number, since it uses less digits than its factorization.

28566378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529018 (or 529012 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 28566378 is about 5344.7523796711. The cubic root of 28566378 is about 305.6926941774.

The spelling of 28566378 in words is "twenty-eight million, five hundred sixty-six thousand, three hundred seventy-eight".