16388244000 has 240 divisors, whose sum is σ = 60151507416. Its totient is φ = 4370112000.

The previous prime is 16388243953. The next prime is 16388244011. The reversal of 16388244000 is 44288361.

It can be written as a sum of positive squares in 4 ways, for example, as 6278343696 + 10109900304 = 79236^2 + 100548^2 .

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 298710 + ... + 349290.

Almost surely, 2^16388244000 is an apocalyptic number.

16388244000 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 16388244000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30075753708).

16388244000 is an abundant number, since it is smaller than the sum of its proper divisors (43763263416).

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

16388244000 is an equidigital number, since it uses as much as digits as its factorization.

16388244000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50618 (or 50591 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 16388244000 in words is "sixteen billion, three hundred eighty-eight million, two hundred forty-four thousand".