28352423281 has 8 divisors (see below), whose sum is σ = 34895290304. Its totient is φ = 22432686480.

The previous prime is 28352423249. The next prime is 28352423287. The reversal of 28352423281 is 18232425382.

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

It is a cyclic number.

It is not a de Polignac number, because 28352423281 - 2⁵ = 28352423249 is a prime.

It is a super-2 number, since 2×28352423281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28352423287) 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, 155782455 + ... + 155782636.

It is an arithmetic number, because the mean of its divisors is an integer number (4361911288).

Almost surely, 2^28352423281 is an apocalyptic number.

It is an amenable number.

28352423281 is a deficient number, since it is larger than the sum of its proper divisors (6542867023).

28352423281 is a wasteful number, since it uses less digits than its factorization.

28352423281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311565111.

The product of its digits is 184320, while the sum is 40.

The spelling of 28352423281 in words is "twenty-eight billion, three hundred fifty-two million, four hundred twenty-three thousand, two hundred eighty-one".