22973940 has 144 divisors (see below), whose sum is σ = 78152256. Its totient is φ = 5414400.

The previous prime is 22973933. The next prime is 22973947. The reversal of 22973940 is 4937922.

It is an interprime number because it is at equal distance from previous prime (22973933) and next prime (22973947).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22973895 and 22973904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22973947) 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, 81039 + ... + 81321.

It is an arithmetic number, because the mean of its divisors is an integer number (542724).

Almost surely, 2^22973940 is an apocalyptic number.

22973940 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 22973940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39076128).

22973940 is an abundant number, since it is smaller than the sum of its proper divisors (55178316).

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

22973940 is a wasteful number, since it uses less digits than its factorization.

22973940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 22973940 is about 4793.1138104577. The cubic root of 22973940 is about 284.2792498960.

The spelling of 22973940 in words is "twenty-two million, nine hundred seventy-three thousand, nine hundred forty".