22016640 has 64 divisors (see below), whose sum is σ = 70184160. Its totient is φ = 5870592.

The previous prime is 22016639. The next prime is 22016647. The reversal of 22016640 is 4661022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (22016647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3814 + ... + 7653.

Almost surely, 2^22016640 is an apocalyptic number.

22016640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22016640 is an abundant number, since it is smaller than the sum of its proper divisors (48167520).

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

22016640 is a wasteful number, since it uses less digits than its factorization.

22016640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11489 (or 11477 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 22016640 is about 4692.1892544952. The cubic root of 22016640 is about 280.2745606171.

Adding to 22016640 its reverse (4661022), we get a palindrome (26677662).

The spelling of 22016640 in words is "twenty-two million, sixteen thousand, six hundred forty".