28749666446 has 4 divisors (see below), whose sum is σ = 43124499672. Its totient is φ = 14374833222.

The previous prime is 28749666443. The next prime is 28749666469. The reversal of 28749666446 is 64466694782.

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 (28749666443) 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, 7187416610 + ... + 7187416613.

It is an arithmetic number, because the mean of its divisors is an integer number (10781124918).

Almost surely, 2^28749666446 is an apocalyptic number.

28749666446 is a deficient number, since it is larger than the sum of its proper divisors (14374833226).

28749666446 is a wasteful number, since it uses less digits than its factorization.

28749666446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14374833225.

The product of its digits is 83607552, while the sum is 62.

The spelling of 28749666446 in words is "twenty-eight billion, seven hundred forty-nine million, six hundred sixty-six thousand, four hundred forty-six".