28776356642 has 16 divisors (see below), whose sum is σ = 47172242592. Its totient is φ = 13056923520.

The previous prime is 28776356573. The next prime is 28776356647. The reversal of 28776356642 is 24665367782.

It is not an unprimeable number, because it can be changed into a prime (28776356647) 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 in 7 ways as a sum of consecutive naturals, for example, 1149263 + ... + 1174034.

It is an arithmetic number, because the mean of its divisors is an integer number (2948265162).

Almost surely, 2^28776356642 is an apocalyptic number.

28776356642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28776356642 is a deficient number, since it is larger than the sum of its proper divisors (18395885950).

28776356642 is a wasteful number, since it uses less digits than its factorization.

28776356642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323873.

The product of its digits is 20321280, while the sum is 56.

The spelling of 28776356642 in words is "twenty-eight billion, seven hundred seventy-six million, three hundred fifty-six thousand, six hundred forty-two".