28423951272 has 32 divisors (see below), whose sum is σ = 78955420800. Its totient is φ = 9474650352.

The previous prime is 28423951249. The next prime is 28423951277. The reversal of 28423951272 is 27215932482.

28423951272 is a `hidden beast` number, since 28 + 42 + 3 + 9 + 512 + 72 = 666.

It is not an unprimeable number, because it can be changed into a prime (28423951277) 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, 65795968 + ... + 65796399.

It is an arithmetic number, because the mean of its divisors is an integer number (2467356900).

Almost surely, 2^28423951272 is an apocalyptic number.

It is an amenable number.

28423951272 is an abundant number, since it is smaller than the sum of its proper divisors (50531469528).

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

28423951272 is a wasteful number, since it uses less digits than its factorization.

28423951272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131592382 (or 131592372 counting only the distinct ones).

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

The spelling of 28423951272 in words is "twenty-eight billion, four hundred twenty-three million, nine hundred fifty-one thousand, two hundred seventy-two".