28133651754 has 160 divisors (see below), whose sum is σ = 69501635280. Its totient is φ = 8452574208.

The previous prime is 28133651729. The next prime is 28133651771. The reversal of 28133651754 is 45715633182.

It is a happy number.

28133651754 is a `hidden beast` number, since 2 + 81 + 3 + 3 + 6 + 517 + 54 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 754985529 + 27378666225 = 27477^2 + 165465^2 .

It is a super-2 number, since 2×28133651754² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 30024774 + ... + 30025710.

Almost surely, 2^28133651754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28133651754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34750817640).

28133651754 is an abundant number, since it is smaller than the sum of its proper divisors (41367983526).

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

28133651754 is a wasteful number, since it uses less digits than its factorization.

28133651754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286 (or 1277 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 28133651754 in words is "twenty-eight billion, one hundred thirty-three million, six hundred fifty-one thousand, seven hundred fifty-four".