28897196449 has 8 divisors (see below), whose sum is σ = 32194942848. Its totient is φ = 25711238160.

The previous prime is 28897196443. The next prime is 28897196453. The reversal of 28897196449 is 94469179882.

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 28897196449 - 2¹¹ = 28897194401 is a prime.

It is a super-2 number, since 2×28897196449² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28897196443) 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, 27946482 + ... + 27947515.

It is an arithmetic number, because the mean of its divisors is an integer number (4024367856).

Almost surely, 2^28897196449 is an apocalyptic number.

It is an amenable number.

28897196449 is a deficient number, since it is larger than the sum of its proper divisors (3297746399).

28897196449 is a wasteful number, since it uses less digits than its factorization.

28897196449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55894055.

The product of its digits is 62705664, while the sum is 67.

The spelling of 28897196449 in words is "twenty-eight billion, eight hundred ninety-seven million, one hundred ninety-six thousand, four hundred forty-nine".