22447740 has 192 divisors, whose sum is σ = 79027200. Its totient is φ = 4644864.

The previous prime is 22447739. The next prime is 22447741. The reversal of 22447740 is 4774422.

It is an interprime number because it is at equal distance from previous prime (22447739) and next prime (22447741).

It is a super-2 number, since 2×22447740² = 1007802062215200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22447698 and 22447707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22447741) 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 63 ways as a sum of consecutive naturals, for example, 231372 + ... + 231468.

It is an arithmetic number, because the mean of its divisors is an integer number (411600).

Almost surely, 2^22447740 is an apocalyptic number.

22447740 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 22447740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39513600).

22447740 is an abundant number, since it is smaller than the sum of its proper divisors (56579460).

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

22447740 is a wasteful number, since it uses less digits than its factorization.

22447740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 22447740 is about 4737.9046001371. The cubic root of 22447740 is about 282.0920679212.

The spelling of 22447740 in words is "twenty-two million, four hundred forty-seven thousand, seven hundred forty".