28229744 has 20 divisors (see below), whose sum is σ = 57574440. Its totient is φ = 13371840.

The previous prime is 28229743. The next prime is 28229767. The reversal of 28229744 is 44792282.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 28229698 and 28229707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28229743) 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 in 3 ways as a sum of consecutive naturals, for example, 46127 + ... + 46734.

It is an arithmetic number, because the mean of its divisors is an integer number (2878722).

Almost surely, 2^28229744 is an apocalyptic number.

It is an amenable number.

28229744 is an abundant number, since it is smaller than the sum of its proper divisors (29344696).

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

28229744 is a wasteful number, since it uses less digits than its factorization.

28229744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92888 (or 92882 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 28229744 is about 5313.1670404760. The cubic root of 28229744 is about 304.4871575136.

The spelling of 28229744 in words is "twenty-eight million, two hundred twenty-nine thousand, seven hundred forty-four".