28663822 has 8 divisors (see below), whose sum is σ = 46904472. Its totient is φ = 13029000.

The previous prime is 28663813. The next prime is 28663847. The reversal of 28663822 is 22836682.

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

It is a super-2 number, since 2×28663822² = 1643229383295368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 651429 + ... + 651472.

It is an arithmetic number, because the mean of its divisors is an integer number (5863059).

Almost surely, 2^28663822 is an apocalyptic number.

28663822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28663822 is a deficient number, since it is larger than the sum of its proper divisors (18240650).

28663822 is a wasteful number, since it uses less digits than its factorization.

28663822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302914.

The product of its digits is 55296, while the sum is 37.

The square root of 28663822 is about 5353.8604763292. The cubic root of 28663822 is about 306.0398868649.

It can be divided in two parts, 286638 and 22, that multiplied together give a palindrome (6306036).

The spelling of 28663822 in words is "twenty-eight million, six hundred sixty-three thousand, eight hundred twenty-two".