28864922 has 4 divisors (see below), whose sum is σ = 43297386. Its totient is φ = 14432460.

The previous prime is 28864903. The next prime is 28864939. The reversal of 28864922 is 22946882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15912121 + 12952801 = 3989^2 + 3599^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28864922.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7216229 + ... + 7216232.

Almost surely, 2^28864922 is an apocalyptic number.

28864922 is a deficient number, since it is larger than the sum of its proper divisors (14432464).

28864922 is a wasteful number, since it uses less digits than its factorization.

28864922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14432463.

The product of its digits is 110592, while the sum is 41.

The square root of 28864922 is about 5372.6084912266. The cubic root of 28864922 is about 306.7539257570.

The spelling of 28864922 in words is "twenty-eight million, eight hundred sixty-four thousand, nine hundred twenty-two".