28061921592 has 96 divisors (see below), whose sum is σ = 78415974000. Its totient is φ = 9060042240.

The previous prime is 28061921527. The next prime is 28061921597. The reversal of 28061921592 is 29512916082.

It is a happy number.

28061921592 is a `hidden beast` number, since 2 + 8 + 0 + 619 + 21 + 5 + 9 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28061921597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 376134 + ... + 444522.

Almost surely, 2^28061921592 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 28061921592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39207987000).

28061921592 is an abundant number, since it is smaller than the sum of its proper divisors (50354052408).

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

28061921592 is a wasteful number, since it uses less digits than its factorization.

28061921592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68581 (or 68574 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 28061921592 in words is "twenty-eight billion, sixty-one million, nine hundred twenty-one thousand, five hundred ninety-two".