28297822 has 16 divisors (see below), whose sum is σ = 49822560. Its totient is φ = 11799648.

The previous prime is 28297777. The next prime is 28297861. The reversal of 28297822 is 22879282.

28297822 is nontrivially palindromic in base 5.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26797 + ... + 27832.

It is an arithmetic number, because the mean of its divisors is an integer number (3113910).

Almost surely, 2^28297822 is an apocalyptic number.

28297822 is a deficient number, since it is larger than the sum of its proper divisors (21524738).

28297822 is a wasteful number, since it uses less digits than its factorization.

28297822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54675.

The product of its digits is 64512, while the sum is 40.

The square root of 28297822 is about 5319.5697194416. The cubic root of 28297822 is about 304.7317250396.

The spelling of 28297822 in words is "twenty-eight million, two hundred ninety-seven thousand, eight hundred twenty-two".