16115388 has 48 divisors (see below), whose sum is σ = 40116384. Its totient is φ = 5017600.

The previous prime is 16115369. The next prime is 16115389. The reversal of 16115388 is 88351161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16115389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39988 + ... + 40388.

It is an arithmetic number, because the mean of its divisors is an integer number (835758).

Almost surely, 2^16115388 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 16115388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20058192).

16115388 is an abundant number, since it is smaller than the sum of its proper divisors (24000996).

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

16115388 is a wasteful number, since it uses less digits than its factorization.

16115388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 620 counting only the distinct ones).

The product of its digits is 5760, while the sum is 33.

The square root of 16115388 is about 4014.3975886800. The cubic root of 16115388 is about 252.5885086571.

The spelling of 16115388 in words is "sixteen million, one hundred fifteen thousand, three hundred eighty-eight".