28731408192 has 168 divisors, whose sum is σ = 83158928424. Its totient is φ = 9483964416.

The previous prime is 28731408187. The next prime is 28731408253. The reversal of 28731408192 is 29180413782.

It is a happy number.

28731408192 is a `hidden beast` number, since 28 + 7 + 31 + 408 + 192 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4140150336 + 24591257856 = 64344^2 + 156816^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37168318 + ... + 37169090.

Almost surely, 2^28731408192 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 28731408192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41579464212).

28731408192 is an abundant number, since it is smaller than the sum of its proper divisors (54427520232).

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

28731408192 is a wasteful number, since it uses less digits than its factorization.

28731408192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337 (or 1324 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 28731408192 in words is "twenty-eight billion, seven hundred thirty-one million, four hundred eight thousand, one hundred ninety-two".