22659440 has 40 divisors (see below), whose sum is σ = 54505440. Its totient is φ = 8750336.

The previous prime is 22659401. The next prime is 22659443. The reversal of 22659440 is 4495622.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×22659440² = 1026900442227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22659397 and 22659406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22659443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2564 + ... + 7203.

It is an arithmetic number, because the mean of its divisors is an integer number (1362636).

Almost surely, 2^22659440 is an apocalyptic number.

22659440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22659440 is an abundant number, since it is smaller than the sum of its proper divisors (31846000).

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

22659440 is a wasteful number, since it uses less digits than its factorization.

22659440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9809 (or 9803 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 22659440 is about 4760.1932733871. The cubic root of 22659440 is about 282.9760787549.

The spelling of 22659440 in words is "twenty-two million, six hundred fifty-nine thousand, four hundred forty".