28451555088 has 320 divisors, whose sum is σ = 84558587904. Its totient is φ = 8167936000.

The previous prime is 28451555057. The next prime is 28451555107. The reversal of 28451555088 is 88055515482.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28451555088.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 164459770 + ... + 164459942.

Almost surely, 2^28451555088 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 28451555088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42279293952).

28451555088 is an abundant number, since it is smaller than the sum of its proper divisors (56107032816).

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

28451555088 is a wasteful number, since it uses less digits than its factorization.

28451555088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 2560000, while the sum is 51.

The spelling of 28451555088 in words is "twenty-eight billion, four hundred fifty-one million, five hundred fifty-five thousand, eighty-eight".