22391380 has 48 divisors (see below), whose sum is σ = 54323136. Its totient is φ = 7662080.

The previous prime is 22391359. The next prime is 22391381. The reversal of 22391380 is 8319322.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22391381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 747 + ... + 6733.

It is an arithmetic number, because the mean of its divisors is an integer number (1131732).

Almost surely, 2^22391380 is an apocalyptic number.

22391380 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 22391380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27161568).

22391380 is an abundant number, since it is smaller than the sum of its proper divisors (31931756).

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

22391380 is a wasteful number, since it uses less digits than its factorization.

22391380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6024 (or 6022 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 22391380 is about 4731.9530851436. The cubic root of 22391380 is about 281.8557852891.

The spelling of 22391380 in words is "twenty-two million, three hundred ninety-one thousand, three hundred eighty".