28538722 has 16 divisors (see below), whose sum is σ = 47021760. Its totient is φ = 12930192.

The previous prime is 28538701. The next prime is 28538723. The reversal of 28538722 is 22783582.

It is not an unprimeable number, because it can be changed into a prime (28538723) 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, 15453 + ... + 17200.

It is an arithmetic number, because the mean of its divisors is an integer number (2938860).

Almost surely, 2^28538722 is an apocalyptic number.

28538722 is a deficient number, since it is larger than the sum of its proper divisors (18483038).

28538722 is a wasteful number, since it uses less digits than its factorization.

28538722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32697.

The product of its digits is 53760, while the sum is 37.

The square root of 28538722 is about 5342.1645425801. The cubic root of 28538722 is about 305.5940121196.

The spelling of 28538722 in words is "twenty-eight million, five hundred thirty-eight thousand, seven hundred twenty-two".