28230057 has 12 divisors (see below), whose sum is σ = 42092544. Its totient is φ = 18212760.

The previous prime is 28230053. The next prime is 28230061. The reversal of 28230057 is 75003282.

It is an interprime number because it is at equal distance from previous prime (28230053) and next prime (28230061).

It is not a de Polignac number, because 28230057 - 2² = 28230053 is a prime.

It is a super-2 number, since 2×28230057² = 1593872236446498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28230057.

It is not an unprimeable number, because it can be changed into a prime (28230053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50313 + ... + 50870.

It is an arithmetic number, because the mean of its divisors is an integer number (3507712).

Almost surely, 2^28230057 is an apocalyptic number.

It is an amenable number.

28230057 is a deficient number, since it is larger than the sum of its proper divisors (13862487).

28230057 is a wasteful number, since it uses less digits than its factorization.

28230057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101220 (or 101217 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 28230057 is about 5313.1964955194. The cubic root of 28230057 is about 304.4882828529.

The spelling of 28230057 in words is "twenty-eight million, two hundred thirty thousand, fifty-seven".