22469840 has 40 divisors (see below), whose sum is σ = 52604520. Its totient is φ = 8925696.

The previous prime is 22469831. The next prime is 22469849. The reversal of 22469840 is 4896422.

It is an interprime number because it is at equal distance from previous prime (22469831) and next prime (22469849).

It can be written as a sum of positive squares in 4 ways, for example, as 4963984 + 17505856 = 2228^2 + 4184^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 22469840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22469849) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11666 + ... + 13454.

It is an arithmetic number, because the mean of its divisors is an integer number (1315113).

Almost surely, 2^22469840 is an apocalyptic number.

22469840 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 22469840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26302260).

22469840 is an abundant number, since it is smaller than the sum of its proper divisors (30134680).

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

22469840 is a wasteful number, since it uses less digits than its factorization.

22469840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959 (or 1953 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 22469840 is about 4740.2362810307. The cubic root of 22469840 is about 282.1846116091.

The spelling of 22469840 in words is "twenty-two million, four hundred sixty-nine thousand, eight hundred forty".