22097940 has 96 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 5529216.

The previous prime is 22097927. The next prime is 22097987. The reversal of 22097940 is 4979022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92341 + ... + 92579.

It is an arithmetic number, because the mean of its divisors is an integer number (685440).

Almost surely, 2^22097940 is an apocalyptic number.

22097940 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 22097940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32901120).

22097940 is an abundant number, since it is smaller than the sum of its proper divisors (43704300).

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

22097940 is a wasteful number, since it uses less digits than its factorization.

22097940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 22097940 is about 4700.8446049620. The cubic root of 22097940 is about 280.6191232113.

The spelling of 22097940 in words is "twenty-two million, ninety-seven thousand, nine hundred forty".