22819140 has 72 divisors (see below), whose sum is σ = 69608448. Its totient is φ = 6050880.

The previous prime is 22819127. The next prime is 22819177. The reversal of 22819140 is 4191822.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59389 + ... + 59771.

It is an arithmetic number, because the mean of its divisors is an integer number (966784).

Almost surely, 2^22819140 is an apocalyptic number.

22819140 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 22819140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34804224).

22819140 is an abundant number, since it is smaller than the sum of its proper divisors (46789308).

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

22819140 is a wasteful number, since it uses less digits than its factorization.

22819140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 22819140 is about 4776.9383500313. The cubic root of 22819140 is about 283.6393126599.

The spelling of 22819140 in words is "twenty-two million, eight hundred nineteen thousand, one hundred forty".