28546839772 has 24 divisors (see below), whose sum is σ = 54890599680. Its totient is φ = 12882482160.

The previous prime is 28546839751. The next prime is 28546839787. The reversal of 28546839772 is 27793864582.

It is a self number, because there is not a number n which added to its sum of digits gives 28546839772.

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 7 ways as a sum of consecutive naturals, for example, 2327668 + ... + 2339899.

It is an arithmetic number, because the mean of its divisors is an integer number (2287108320).

Almost surely, 2^28546839772 is an apocalyptic number.

28546839772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28546839772 is a deficient number, since it is larger than the sum of its proper divisors (26343759908).

28546839772 is a wasteful number, since it uses less digits than its factorization.

28546839772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667721 (or 4667719 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 61.

The spelling of 28546839772 in words is "twenty-eight billion, five hundred forty-six million, eight hundred thirty-nine thousand, seven hundred seventy-two".