28077143052 has 96 divisors (see below), whose sum is σ = 77381484544. Its totient is φ = 7753838400.

The previous prime is 28077143009. The next prime is 28077143053. The reversal of 28077143052 is 25034177082.

It is a self number, because there is not a number n which added to its sum of digits gives 28077143052.

It is not an unprimeable number, because it can be changed into a prime (28077143053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2293227 + ... + 2305437.

Almost surely, 2^28077143052 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 28077143052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38690742272).

28077143052 is an abundant number, since it is smaller than the sum of its proper divisors (49304341492).

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

28077143052 is a wasteful number, since it uses less digits than its factorization.

28077143052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13139 (or 13137 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 28077143052 in words is "twenty-eight billion, seventy-seven million, one hundred forty-three thousand, fifty-two".