15728670720 has 1008 divisors, whose sum is σ = 67352365080. Its totient is φ = 3511517184.

The previous prime is 15728670709. The next prime is 15728670779. The reversal of 15728670720 is 2707682751.

15728670720 is a `hidden beast` number, since 1 + 572 + 8 + 6 + 7 + 0 + 72 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 365783019 + ... + 365783061.

Almost surely, 2^15728670720 is an apocalyptic number.

15728670720 is a gapful number since it is divisible by the number (10) 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 15728670720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33676182540).

15728670720 is an abundant number, since it is smaller than the sum of its proper divisors (51623694360).

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

15728670720 is an frugal number, since it uses more digits than its factorization.

15728670720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 15728670720 in words is "fifteen billion, seven hundred twenty-eight million, six hundred seventy thousand, seven hundred twenty".