28621171488 has 384 divisors, whose sum is σ = 94932891648. Its totient is φ = 7350165504.

The previous prime is 28621171487. The next prime is 28621171511. The reversal of 28621171488 is 88417112682.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28621171487) 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 63 ways as a sum of consecutive naturals, for example, 62628156 + ... + 62628612.

It is an arithmetic number, because the mean of its divisors is an integer number (247221072).

Almost surely, 2^28621171488 is an apocalyptic number.

28621171488 is a gapful number since it is divisible by the number (28) 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 28621171488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47466445824).

28621171488 is an abundant number, since it is smaller than the sum of its proper divisors (66311720160).

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

28621171488 is a wasteful number, since it uses less digits than its factorization.

28621171488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 656 counting only the distinct ones).

The product of its digits is 344064, while the sum is 48.

The spelling of 28621171488 in words is "twenty-eight billion, six hundred twenty-one million, one hundred seventy-one thousand, four hundred eighty-eight".