7728069888 has 540 divisors, whose sum is σ = 28580418048. Its totient is φ = 1991485440.

The previous prime is 7728069871. The next prime is 7728069929. The reversal of 7728069888 is 8889608277.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 60850881 + ... + 60851007.

Almost surely, 2^7728069888 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 7728069888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14290209024).

7728069888 is an abundant number, since it is smaller than the sum of its proper divisors (20852348160).

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

7728069888 is a wasteful number, since it uses less digits than its factorization.

7728069888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 63.

The square root of 7728069888 is about 87909.4414042087. The cubic root of 7728069888 is about 1977.0774391450.

The spelling of 7728069888 in words is "seven billion, seven hundred twenty-eight million, sixty-nine thousand, eight hundred eighty-eight".