28815036384 has 96 divisors (see below), whose sum is σ = 76686704640. Its totient is φ = 9472320000.

The previous prime is 28815036311. The next prime is 28815036389. The reversal of 28815036384 is 48363051882.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×28815036384² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28815036389) 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 15 ways as a sum of consecutive naturals, for example, 8727534 + ... + 8730834.

It is an arithmetic number, because the mean of its divisors is an integer number (798819840).

Almost surely, 2^28815036384 is an apocalyptic number.

28815036384 is a gapful number since it is divisible by the number (24) 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 28815036384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38343352320).

28815036384 is an abundant number, since it is smaller than the sum of its proper divisors (47871668256).

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

28815036384 is a wasteful number, since it uses less digits than its factorization.

28815036384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544 (or 4536 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 28815036384 in words is "twenty-eight billion, eight hundred fifteen million, thirty-six thousand, three hundred eighty-four".