28521979327 has 8 divisors (see below), whose sum is σ = 28894371840. Its totient is φ = 28149870840.

The previous prime is 28521979307. The next prime is 28521979351. The reversal of 28521979327 is 72397912582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28521979327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28521979307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135018 + ... + 274360.

It is an arithmetic number, because the mean of its divisors is an integer number (3611796480).

Almost surely, 2^28521979327 is an apocalyptic number.

28521979327 is a deficient number, since it is larger than the sum of its proper divisors (372392513).

28521979327 is a wasteful number, since it uses less digits than its factorization.

28521979327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142013.

The product of its digits is 3810240, while the sum is 55.

The spelling of 28521979327 in words is "twenty-eight billion, five hundred twenty-one million, nine hundred seventy-nine thousand, three hundred twenty-seven".