28147274 has 16 divisors (see below), whose sum is σ = 44997768. Its totient is φ = 13158912.

The previous prime is 28147271. The next prime is 28147297. The reversal of 28147274 is 47274182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24750625 + 3396649 = 4975^2 + 1843^2 .

It is a super-3 number, since 3×28147274³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28147271) 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, 2702 + ... + 7974.

Almost surely, 2^28147274 is an apocalyptic number.

28147274 is a deficient number, since it is larger than the sum of its proper divisors (16850494).

28147274 is a wasteful number, since it uses less digits than its factorization.

28147274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5449.

The product of its digits is 25088, while the sum is 35.

The square root of 28147274 is about 5305.4004561390. The cubic root of 28147274 is about 304.1903600567.

The spelling of 28147274 in words is "twenty-eight million, one hundred forty-seven thousand, two hundred seventy-four".