16244388 has 60 divisors (see below), whose sum is σ = 42854812. Its totient is φ = 5365440.

The previous prime is 16244383. The next prime is 16244399. The reversal of 16244388 is 88344261.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 15116544 = 1062^2 + 3888^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16244383) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 58506 + ... + 58782.

Almost surely, 2^16244388 is an apocalyptic number.

16244388 is a gapful number since it is divisible by the number (18) 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 16244388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21427406).

16244388 is an abundant number, since it is smaller than the sum of its proper divisors (26610424).

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

16244388 is a wasteful number, since it uses less digits than its factorization.

16244388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 463 counting only the distinct ones).

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

The square root of 16244388 is about 4030.4327311097. The cubic root of 16244388 is about 253.2606893897.

The spelling of 16244388 in words is "sixteen million, two hundred forty-four thousand, three hundred eighty-eight".