22797740 has 72 divisors (see below), whose sum is σ = 57092112. Its totient is φ = 7620480.

The previous prime is 22797737. The next prime is 22797743. The reversal of 22797740 is 4779722.

It is an interprime number because it is at equal distance from previous prime (22797737) and next prime (22797743).

It is a junction number, because it is equal to n+sod(n) for n = 22797694 and 22797703.

It is not an unprimeable number, because it can be changed into a prime (22797743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41870 + ... + 42410.

It is an arithmetic number, because the mean of its divisors is an integer number (792946).

Almost surely, 2^22797740 is an apocalyptic number.

22797740 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 22797740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28546056).

22797740 is an abundant number, since it is smaller than the sum of its proper divisors (34294372).

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

22797740 is a wasteful number, since it uses less digits than its factorization.

22797740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 22797740 is about 4774.6978962024. The cubic root of 22797740 is about 283.5506184066.

The spelling of 22797740 in words is "twenty-two million, seven hundred ninety-seven thousand, seven hundred forty".