22307740 has 144 divisors (see below), whose sum is σ = 62741952. Its totient is φ = 6580224.

The previous prime is 22307737. The next prime is 22307741. The reversal of 22307740 is 4770322.

It is a super-3 number, since 3×22307740³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22307741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 216529 + ... + 216631.

It is an arithmetic number, because the mean of its divisors is an integer number (435708).

Almost surely, 2^22307740 is an apocalyptic number.

22307740 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 22307740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31370976).

22307740 is an abundant number, since it is smaller than the sum of its proper divisors (40434212).

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

22307740 is a wasteful number, since it uses less digits than its factorization.

22307740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 22307740 is about 4723.1070282178. The cubic root of 22307740 is about 281.5044025699.

The spelling of 22307740 in words is "twenty-two million, three hundred seven thousand, seven hundred forty".