28139772372 has 24 divisors (see below), whose sum is σ = 68514229056. Its totient is φ = 8972101248.

The previous prime is 28139772337. The next prime is 28139772443. The reversal of 28139772372 is 27327793182.

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, 50977573 + ... + 50978124.

It is an arithmetic number, because the mean of its divisors is an integer number (2854759544).

Almost surely, 2^28139772372 is an apocalyptic number.

It is an amenable number.

28139772372 is an abundant number, since it is smaller than the sum of its proper divisors (40374456684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28139772372 is a wasteful number, since it uses less digits than its factorization.

28139772372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101955727 (or 101955725 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 51.

The spelling of 28139772372 in words is "twenty-eight billion, one hundred thirty-nine million, seven hundred seventy-two thousand, three hundred seventy-two".