28257346 has 16 divisors (see below), whose sum is σ = 45985464. Its totient is φ = 12945024.

The previous prime is 28257343. The next prime is 28257347. The reversal of 28257346 is 64375282.

It can be written as a sum of positive squares in 4 ways, for example, as 17766225 + 10491121 = 4215^2 + 3239^2 .

It is not an unprimeable number, because it can be changed into a prime (28257343) 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, 405 + ... + 7528.

Almost surely, 2^28257346 is an apocalyptic number.

28257346 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28257346 is a deficient number, since it is larger than the sum of its proper divisors (17728118).

28257346 is a wasteful number, since it uses less digits than its factorization.

28257346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085.

The product of its digits is 80640, while the sum is 37.

The square root of 28257346 is about 5315.7639149985. The cubic root of 28257346 is about 304.5863639489.

The spelling of 28257346 in words is "twenty-eight million, two hundred fifty-seven thousand, three hundred forty-six".