28708519894 has 16 divisors (see below), whose sum is σ = 43615321920. Its totient is φ = 14170141440.

The previous prime is 28708519877. The next prime is 28708519909. The reversal of 28708519894 is 49891580782.

It is a super-2 number, since 2×28708519894² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227292 + ... + 1250464.

It is an arithmetic number, because the mean of its divisors is an integer number (2725957620).

Almost surely, 2^28708519894 is an apocalyptic number.

28708519894 is a deficient number, since it is larger than the sum of its proper divisors (14906802026).

28708519894 is a wasteful number, since it uses less digits than its factorization.

28708519894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31095.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 28708519894 in words is "twenty-eight billion, seven hundred eight million, five hundred nineteen thousand, eight hundred ninety-four".