28396671917472 has 240 divisors, whose sum is σ = 83671419896064. Its totient is φ = 9447710400000.

The previous prime is 28396671917381. The next prime is 28396671917513. The reversal of 28396671917472 is 27471917669382.

28396671917472 is a `hidden beast` number, since 2 + 8 + 3 + 9 + 6 + 67 + 1 + 91 + 7 + 472 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 28396671917472.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5277208222 + ... + 5277213602.

Almost surely, 2^{28396671917472} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28396671917472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41835709948032).

28396671917472 is an abundant number, since it is smaller than the sum of its proper divisors (55274747978592).

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

28396671917472 is a wasteful number, since it uses less digits than its factorization.

28396671917472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8865 (or 8848 counting only the distinct ones).

The product of its digits is 384072192, while the sum is 72.

The spelling of 28396671917472 in words is "twenty-eight trillion, three hundred ninety-six billion, six hundred seventy-one million, nine hundred seventeen thousand, four hundred seventy-two".