28386057 has 16 divisors (see below), whose sum is σ = 45532160. Its totient is φ = 15366672.

The previous prime is 28386047. The next prime is 28386077. The reversal of 28386057 is 75068382.

It is not a de Polignac number, because 28386057 - 2¹⁰ = 28385033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28386047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35173 + ... + 35970.

It is an arithmetic number, because the mean of its divisors is an integer number (2845760).

Almost surely, 2^28386057 is an apocalyptic number.

It is an amenable number.

28386057 is a deficient number, since it is larger than the sum of its proper divisors (17146103).

28386057 is a wasteful number, since it uses less digits than its factorization.

28386057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71172.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28386057 is about 5327.8566985233. The cubic root of 28386057 is about 305.0481228377.

The spelling of 28386057 in words is "twenty-eight million, three hundred eighty-six thousand, fifty-seven".