28228734 has 12 divisors (see below), whose sum is σ = 61162296. Its totient is φ = 9409572.

The previous prime is 28228729. The next prime is 28228741. The reversal of 28228734 is 43782282.

It is a super-2 number, since 2×28228734² = 1593722846485512, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 784114 + ... + 784149.

It is an arithmetic number, because the mean of its divisors is an integer number (5096858).

Almost surely, 2^28228734 is an apocalyptic number.

28228734 is an abundant number, since it is smaller than the sum of its proper divisors (32933562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28228734 is a wasteful number, since it uses less digits than its factorization.

28228734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568271 (or 1568268 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 28228734 is about 5313.0719927364. The cubic root of 28228734 is about 304.4835261700.

The spelling of 28228734 in words is "twenty-eight million, two hundred twenty-eight thousand, seven hundred thirty-four".