28197388622 has 32 divisors (see below), whose sum is σ = 45782573760. Its totient is φ = 12947800320.

The previous prime is 28197388621. The next prime is 28197388693. The reversal of 28197388622 is 22688379182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28197388621) 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 in 15 ways as a sum of consecutive naturals, for example, 4299698 + ... + 4306250.

It is an arithmetic number, because the mean of its divisors is an integer number (1430705430).

Almost surely, 2^28197388622 is an apocalyptic number.

28197388622 is a deficient number, since it is larger than the sum of its proper divisors (17585185138).

28197388622 is a wasteful number, since it uses less digits than its factorization.

28197388622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7388.

The product of its digits is 4644864, while the sum is 56.

The spelling of 28197388622 in words is "twenty-eight billion, one hundred ninety-seven million, three hundred eighty-eight thousand, six hundred twenty-two".