28078922 has 8 divisors (see below), whose sum is σ = 44335200. Its totient is φ = 13300524.

The previous prime is 28078907. The next prime is 28078937. The reversal of 28078922 is 22987082.

It is an interprime number because it is at equal distance from previous prime (28078907) and next prime (28078937).

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 738919 = 28078922 / (2 + 8 + 0 + 7 + 8 + 9 + 2 + 2).

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 in 3 ways as a sum of consecutive naturals, for example, 369422 + ... + 369497.

It is an arithmetic number, because the mean of its divisors is an integer number (5541900).

Almost surely, 2^28078922 is an apocalyptic number.

28078922 is a deficient number, since it is larger than the sum of its proper divisors (16256278).

28078922 is a wasteful number, since it uses less digits than its factorization.

28078922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738940.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28078922 is about 5298.9548026002. The cubic root of 28078922 is about 303.9439315456.

The spelling of 28078922 in words is "twenty-eight million, seventy-eight thousand, nine hundred twenty-two".