15438840000 has 140 divisors (see below), whose sum is σ = 51044804184. Its totient is φ = 4116992000.

The previous prime is 15438839989. The next prime is 15438840029. The reversal of 15438840000 is 4883451.

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 19 ways as a sum of consecutive naturals, for example, 55672 + ... + 184328.

Almost surely, 2^15438840000 is an apocalyptic number.

15438840000 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 15438840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25522402092).

15438840000 is an abundant number, since it is smaller than the sum of its proper divisors (35605964184).

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

15438840000 is an equidigital number, since it uses as much as digits as its factorization.

15438840000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128692 (or 128667 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 15438840000 in words is "fifteen billion, four hundred thirty-eight million, eight hundred forty thousand".