16222240 has 48 divisors (see below), whose sum is σ = 39068568. Its totient is φ = 6363136.

The previous prime is 16222211. The next prime is 16222259. The reversal of 16222240 is 4222261.

It can be written as a sum of positive squares in 4 ways, for example, as 15904144 + 318096 = 3988^2 + 564^2 .

It is a super-2 number, since 2×16222240² = 526322141235200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7524 + ... + 9436.

Almost surely, 2^16222240 is an apocalyptic number.

16222240 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 16222240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19534284).

16222240 is an abundant number, since it is smaller than the sum of its proper divisors (22846328).

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

16222240 is a wasteful number, since it uses less digits than its factorization.

16222240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981 (or 1973 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 16222240 is about 4027.6841981466. The cubic root of 16222240 is about 253.1455364123.

The spelling of 16222240 in words is "sixteen million, two hundred twenty-two thousand, two hundred forty".