28478088897 has 8 divisors (see below), whose sum is σ = 37992601920. Its totient is φ = 18974484240.

The previous prime is 28478088893. The next prime is 28478088931. The reversal of 28478088897 is 79888087482.

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

It is not a de Polignac number, because 28478088897 - 2² = 28478088893 is a prime.

It is a super-2 number, since 2×28478088897² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28478088893) 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, 2720997 + ... + 2731442.

It is an arithmetic number, because the mean of its divisors is an integer number (4749075240).

Almost surely, 2^28478088897 is an apocalyptic number.

It is an amenable number.

28478088897 is a deficient number, since it is larger than the sum of its proper divisors (9514513023).

28478088897 is a wasteful number, since it uses less digits than its factorization.

28478088897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454183.

The product of its (nonzero) digits is 115605504, while the sum is 69.

The spelling of 28478088897 in words is "twenty-eight billion, four hundred seventy-eight million, eighty-eight thousand, eight hundred ninety-seven".