28513622 has 4 divisors (see below), whose sum is σ = 42770436. Its totient is φ = 14256810.

The previous prime is 28513621. The next prime is 28513633. The reversal of 28513622 is 22631582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22631582 = 2 ⋅11315791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28513621) by changing a digit.

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, 7128404 + ... + 7128407.

It is an arithmetic number, because the mean of its divisors is an integer number (10692609).

Almost surely, 2^28513622 is an apocalyptic number.

28513622 is a deficient number, since it is larger than the sum of its proper divisors (14256814).

28513622 is a wasteful number, since it uses less digits than its factorization.

28513622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14256813.

The product of its digits is 5760, while the sum is 29.

The square root of 28513622 is about 5339.8147907957. The cubic root of 28513622 is about 305.5043951713.

The spelling of 28513622 in words is "twenty-eight million, five hundred thirteen thousand, six hundred twenty-two".