28840809879495 has 32 divisors (see below), whose sum is σ = 51273417507840. Its totient is φ = 15381505285920.

The previous prime is 28840809879491. The next prime is 28840809879509. The reversal of 28840809879495 is 59497890804882.

28840809879495 is a `hidden beast` number, since 2 + 8 + 8 + 40 + 8 + 0 + 9 + 87 + 9 + 495 = 666.

It is not a de Polignac number, because 28840809879495 - 2² = 28840809879491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28840809879491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6347190 + ... + 9897900.

It is an arithmetic number, because the mean of its divisors is an integer number (1602294297120).

Almost surely, 2^{28840809879495} is an apocalyptic number.

28840809879495 is a deficient number, since it is larger than the sum of its proper divisors (22432607628345).

28840809879495 is a wasteful number, since it uses less digits than its factorization.

28840809879495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610892 (or 3610886 counting only the distinct ones).

The product of its (nonzero) digits is 3344302080, while the sum is 81.

The spelling of 28840809879495 in words is "twenty-eight trillion, eight hundred forty billion, eight hundred nine million, eight hundred seventy-nine thousand, four hundred ninety-five".