16214440 has 64 divisors (see below), whose sum is σ = 40772160. Its totient is φ = 5752320.

The previous prime is 16214437. The next prime is 16214441. The reversal of 16214440 is 4441261.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (16214441) 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, 18492 + ... + 19348.

It is an arithmetic number, because the mean of its divisors is an integer number (637065).

Almost surely, 2^16214440 is an apocalyptic number.

16214440 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 16214440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20386080).

16214440 is an abundant number, since it is smaller than the sum of its proper divisors (24557720).

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

16214440 is a wasteful number, since it uses less digits than its factorization.

16214440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 16214440 is about 4026.7157833649. The cubic root of 16214440 is about 253.1049573116.

The spelling of 16214440 in words is "sixteen million, two hundred fourteen thousand, four hundred forty".