28557622 has 4 divisors (see below), whose sum is σ = 42836436. Its totient is φ = 14278810.

The previous prime is 28557553. The next prime is 28557643. The reversal of 28557622 is 22675582.

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

It is a congruent number.

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, 7139404 + ... + 7139407.

It is an arithmetic number, because the mean of its divisors is an integer number (10709109).

Almost surely, 2^28557622 is an apocalyptic number.

28557622 is a deficient number, since it is larger than the sum of its proper divisors (14278814).

28557622 is a wasteful number, since it uses less digits than its factorization.

28557622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14278813.

The product of its digits is 67200, while the sum is 37.

The square root of 28557622 is about 5343.9331956902. The cubic root of 28557622 is about 305.6614579369.

The spelling of 28557622 in words is "twenty-eight million, five hundred fifty-seven thousand, six hundred twenty-two".