22641740 has 48 divisors (see below), whose sum is σ = 52454304. Its totient is φ = 8140800.

The previous prime is 22641737. The next prime is 22641757. The reversal of 22641740 is 4714622.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20810 + ... + 21870.

It is an arithmetic number, because the mean of its divisors is an integer number (1092798).

Almost surely, 2^22641740 is an apocalyptic number.

22641740 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 22641740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26227152).

22641740 is an abundant number, since it is smaller than the sum of its proper divisors (29812564).

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

22641740 is a wasteful number, since it uses less digits than its factorization.

22641740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 22641740 is about 4758.3337419731. Note that the first 3 decimals coincide. The cubic root of 22641740 is about 282.9023790620.

It can be divided in two parts, 2264 and 1740, that added together give a palindrome (4004).

The spelling of 22641740 in words is "twenty-two million, six hundred forty-one thousand, seven hundred forty".