22598440 has 64 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 8414208.

The previous prime is 22598413. The next prime is 22598441. The reversal of 22598440 is 4489522.

22598440 = T₂₆₄ + T₂₆₅ + ... + T₅₃₅.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 22598396 and 22598405.

It is not an unprimeable number, because it can be changed into a prime (22598441) 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 15 ways as a sum of consecutive naturals, for example, 113461 + ... + 113659.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^22598440 is an apocalyptic number.

22598440 is a gapful number since it is divisible by the number (20) 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 22598440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27216000).

22598440 is an abundant number, since it is smaller than the sum of its proper divisors (31833560).

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

22598440 is a wasteful number, since it uses less digits than its factorization.

22598440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 22598440 is about 4753.7816525373. The cubic root of 22598440 is about 282.7219234070.

The spelling of 22598440 in words is "twenty-two million, five hundred ninety-eight thousand, four hundred forty".