16228440 has 96 divisors (see below), whose sum is σ = 53679600. Its totient is φ = 4250880.

The previous prime is 16228427. The next prime is 16228453. The reversal of 16228440 is 4482261.

16228440 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16228427) and next prime (16228453).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21591 + ... + 22329.

Almost surely, 2^16228440 is an apocalyptic number.

16228440 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 16228440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26839800).

16228440 is an abundant number, since it is smaller than the sum of its proper divisors (37451160).

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

16228440 is a wasteful number, since it uses less digits than its factorization.

16228440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 16228440 is about 4028.4537976747. The cubic root of 16228440 is about 253.1777823171.

The spelling of 16228440 in words is "sixteen million, two hundred twenty-eight thousand, four hundred forty".