28408417873919 has 16 divisors (see below), whose sum is σ = 29993445081600. Its totient is φ = 26832381335424.

The previous prime is 28408417873909. The next prime is 28408417873921. The reversal of 28408417873919 is 91937871480482.

It is a cyclic number.

It is not a de Polignac number, because 28408417873919 - 2¹² = 28408417869823 is a prime.

It is a super-2 number, since 2×28408417873919² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28408417873909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217425392 + ... + 217556010.

It is an arithmetic number, because the mean of its divisors is an integer number (1874590317600).

Almost surely, 2^{28408417873919} is an apocalyptic number.

28408417873919 is a deficient number, since it is larger than the sum of its proper divisors (1585027207681).

28408417873919 is a wasteful number, since it uses less digits than its factorization.

28408417873919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164942.

The product of its (nonzero) digits is 195084288, while the sum is 71.

The spelling of 28408417873919 in words is "twenty-eight trillion, four hundred eight billion, four hundred seventeen million, eight hundred seventy-three thousand, nine hundred nineteen".