28257274 has 12 divisors (see below), whose sum is σ = 43103502. Its totient is φ = 13893360.

The previous prime is 28257259. The next prime is 28257277. The reversal of 28257274 is 47275282.

It can be written as a sum of positive squares in 3 ways, for example, as 1580049 + 26677225 = 1257^2 + 5165^2 .

It is a super-2 number, since 2×28257274² = 1596947067822152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28257277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5544 + ... + 9340.

Almost surely, 2^28257274 is an apocalyptic number.

28257274 is a deficient number, since it is larger than the sum of its proper divisors (14846228).

28257274 is an equidigital number, since it uses as much as digits as its factorization.

28257274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3921 (or 3860 counting only the distinct ones).

The product of its digits is 62720, while the sum is 37.

The square root of 28257274 is about 5315.7571426844. The cubic root of 28257274 is about 304.5861052523.

The spelling of 28257274 in words is "twenty-eight million, two hundred fifty-seven thousand, two hundred seventy-four".