28622774 has 4 divisors (see below), whose sum is σ = 42934164. Its totient is φ = 14311386.

The previous prime is 28622771. The next prime is 28622779. The reversal of 28622774 is 47722682.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28622771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7155692 + ... + 7155695.

It is an arithmetic number, because the mean of its divisors is an integer number (10733541).

Almost surely, 2^28622774 is an apocalyptic number.

28622774 is a deficient number, since it is larger than the sum of its proper divisors (14311390).

28622774 is a wasteful number, since it uses less digits than its factorization.

28622774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14311389.

The product of its digits is 75264, while the sum is 38.

The square root of 28622774 is about 5350.0256074154. The cubic root of 28622774 is about 305.8937290278.

The spelling of 28622774 in words is "twenty-eight million, six hundred twenty-two thousand, seven hundred seventy-four".