28281628032 has 64 divisors (see below), whose sum is σ = 85854950400. Its totient is φ = 8080464384.

The previous prime is 28281628031. The next prime is 28281628033. The reversal of 28281628032 is 23082618282.

It is an interprime number because it is at equal distance from previous prime (28281628031) and next prime (28281628033).

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28281628031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5258032 + ... + 5263407.

It is an arithmetic number, because the mean of its divisors is an integer number (1341483600).

Almost surely, 2^28281628032 is an apocalyptic number.

It is an amenable number.

28281628032 is an abundant number, since it is smaller than the sum of its proper divisors (57573322368).

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

28281628032 is a wasteful number, since it uses less digits than its factorization.

28281628032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10521463 (or 10521451 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 28281628032 in words is "twenty-eight billion, two hundred eighty-one million, six hundred twenty-eight thousand, thirty-two".