28404531156 has 96 divisors (see below), whose sum is σ = 72057807360. Its totient is φ = 8679049344.

The previous prime is 28404531151. The next prime is 28404531269. The reversal of 28404531156 is 65113540482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28404531151) 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, 1035490 + ... + 1062566.

It is an arithmetic number, because the mean of its divisors is an integer number (750602160).

Almost surely, 2^28404531156 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 28404531156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36028903680).

28404531156 is an abundant number, since it is smaller than the sum of its proper divisors (43653276204).

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

28404531156 is a wasteful number, since it uses less digits than its factorization.

28404531156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27253 (or 27251 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 28404531156 in words is "twenty-eight billion, four hundred four million, five hundred thirty-one thousand, one hundred fifty-six".