28574387 has 4 divisors (see below), whose sum is σ = 28585080. Its totient is φ = 28563696.

The previous prime is 28574383. The next prime is 28574393. The reversal of 28574387 is 78347582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28574387 - 2² = 28574383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28574383) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2564 + ... + 7982.

It is an arithmetic number, because the mean of its divisors is an integer number (7146270).

Almost surely, 2^28574387 is an apocalyptic number.

28574387 is a deficient number, since it is larger than the sum of its proper divisors (10693).

28574387 is an equidigital number, since it uses as much as digits as its factorization.

28574387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10692.

The product of its digits is 376320, while the sum is 44.

The square root of 28574387 is about 5345.5015667381. The cubic root of 28574387 is about 305.7212599738.

The spelling of 28574387 in words is "twenty-eight million, five hundred seventy-four thousand, three hundred eighty-seven".