28398674 has 4 divisors (see below), whose sum is σ = 42598014. Its totient is φ = 14199336.

The previous prime is 28398661. The next prime is 28398677. The reversal of 28398674 is 47689382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27825625 + 573049 = 5275^2 + 757^2 .

It is not an unprimeable number, because it can be changed into a prime (28398677) 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 as a sum of consecutive naturals, namely, 7099667 + ... + 7099670.

Almost surely, 2^28398674 is an apocalyptic number.

28398674 is a deficient number, since it is larger than the sum of its proper divisors (14199340).

28398674 is a wasteful number, since it uses less digits than its factorization.

28398674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14199339.

The product of its digits is 580608, while the sum is 47.

The square root of 28398674 is about 5329.0406266044. The cubic root of 28398674 is about 305.0933119490.

The spelling of 28398674 in words is "twenty-eight million, three hundred ninety-eight thousand, six hundred seventy-four".