28694875416 has 64 divisors (see below), whose sum is σ = 76231536480. Its totient is φ = 8969779200.

The previous prime is 28694875387. The next prime is 28694875421. The reversal of 28694875416 is 61457849682.

It is a happy number.

It is a super-2 number, since 2×28694875416² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28694875416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13935 + ... + 239966.

Almost surely, 2^28694875416 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 28694875416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38115768240).

28694875416 is an abundant number, since it is smaller than the sum of its proper divisors (47536661064).

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

28694875416 is a wasteful number, since it uses less digits than its factorization.

28694875416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254204 (or 254200 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 60.

The spelling of 28694875416 in words is "twenty-eight billion, six hundred ninety-four million, eight hundred seventy-five thousand, four hundred sixteen".