28388072592 has 240 divisors, whose sum is σ = 91230327552. Its totient is φ = 8473196160.

The previous prime is 28388072507. The next prime is 28388072599. The reversal of 28388072592 is 29527088382.

It is a happy number.

28388072592 is a `hidden beast` number, since 2 + 8 + 388 + 0 + 7 + 259 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28388072599) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2860503 + ... + 2870409.

Almost surely, 2^28388072592 is an apocalyptic number.

28388072592 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28388072592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45615163776).

28388072592 is an abundant number, since it is smaller than the sum of its proper divisors (62842254960).

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

28388072592 is a wasteful number, since it uses less digits than its factorization.

28388072592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10008 (or 9990 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 28388072592 in words is "twenty-eight billion, three hundred eighty-eight million, seventy-two thousand, five hundred ninety-two".