28154517788 has 12 divisors (see below), whose sum is σ = 49281059520. Its totient is φ = 14074215072.

The previous prime is 28154517763. The next prime is 28154517793. The reversal of 28154517788 is 88771545182.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 740081 + ... + 777192.

It is an arithmetic number, because the mean of its divisors is an integer number (4106754960).

Almost surely, 2^28154517788 is an apocalyptic number.

It is an amenable number.

28154517788 is a deficient number, since it is larger than the sum of its proper divisors (21126541732).

28154517788 is a wasteful number, since it uses less digits than its factorization.

28154517788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521916 (or 1521914 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 56.

The spelling of 28154517788 in words is "twenty-eight billion, one hundred fifty-four million, five hundred seventeen thousand, seven hundred eighty-eight".