28315031472 has 480 divisors, whose sum is σ = 103080513536. Its totient is φ = 7054387200.

The previous prime is 28315031471. The next prime is 28315031473. The reversal of 28315031472 is 27413051382.

28315031472 is a `hidden beast` number, since 2 + 8 + 3 + 1 + 503 + 147 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (28315031471) and next prime (28315031473).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28315031471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17466822 + ... + 17468442.

Almost surely, 2^28315031472 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 28315031472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51540256768).

28315031472 is an abundant number, since it is smaller than the sum of its proper divisors (74765482064).

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

28315031472 is a wasteful number, since it uses less digits than its factorization.

28315031472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 28315031472 in words is "twenty-eight billion, three hundred fifteen million, thirty-one thousand, four hundred seventy-two".