28443977542 has 32 divisors (see below), whose sum is σ = 43502828544. Its totient is φ = 13945478400.

The previous prime is 28443977539. The next prime is 28443977557. The reversal of 28443977542 is 24577934482.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35072317 + ... + 35073127.

It is an arithmetic number, because the mean of its divisors is an integer number (1359463392).

Almost surely, 2^28443977542 is an apocalyptic number.

28443977542 is a deficient number, since it is larger than the sum of its proper divisors (15058851002).

28443977542 is a wasteful number, since it uses less digits than its factorization.

28443977542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924.

The product of its digits is 13547520, while the sum is 55.

The spelling of 28443977542 in words is "twenty-eight billion, four hundred forty-three million, nine hundred seventy-seven thousand, five hundred forty-two".