28057635312 has 320 divisors, whose sum is σ = 92771205120. Its totient is φ = 7113388032.

The previous prime is 28057635311. The next prime is 28057635323. The reversal of 28057635312 is 21353675082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057635311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28542373 + ... + 28543355.

It is an arithmetic number, because the mean of its divisors is an integer number (289910016).

Almost surely, 2^28057635312 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 28057635312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46385602560).

28057635312 is an abundant number, since it is smaller than the sum of its proper divisors (64713569808).

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

28057635312 is a wasteful number, since it uses less digits than its factorization.

28057635312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 28057635312 in words is "twenty-eight billion, fifty-seven million, six hundred thirty-five thousand, three hundred twelve".