28227747 has 8 divisors (see below), whose sum is σ = 38347344. Its totient is φ = 18463328.

The previous prime is 28227743. The next prime is 28227761. The reversal of 28227747 is 74772282.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28227747 - 2² = 28227743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28227743) 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, 88608 + ... + 88925.

It is an arithmetic number, because the mean of its divisors is an integer number (4793418).

Almost surely, 2^28227747 is an apocalyptic number.

28227747 is a deficient number, since it is larger than the sum of its proper divisors (10119597).

28227747 is a wasteful number, since it uses less digits than its factorization.

28227747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177589.

The product of its digits is 87808, while the sum is 39.

The square root of 28227747 is about 5312.9791078076. The cubic root of 28227747 is about 304.4799774367.

The spelling of 28227747 in words is "twenty-eight million, two hundred twenty-seven thousand, seven hundred forty-seven".