28143540972 has 36 divisors (see below), whose sum is σ = 71148477400. Its totient is φ = 9380143872.

The previous prime is 28143540937. The next prime is 28143540977. The reversal of 28143540972 is 27904534182.

28143540972 is a `hidden beast` number, since 2 + 8 + 14 + 3 + 540 + 97 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (28143540977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331779 + ... + 407877.

Almost surely, 2^28143540972 is an apocalyptic number.

It is an amenable number.

28143540972 is an abundant number, since it is smaller than the sum of its proper divisors (43004936428).

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

28143540972 is a wasteful number, since it uses less digits than its factorization.

28143540972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86382 (or 86377 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 28143540972 in words is "twenty-eight billion, one hundred forty-three million, five hundred forty thousand, nine hundred seventy-two".