22712340 has 96 divisors (see below), whose sum is σ = 76978944. Its totient is φ = 4884480.

The previous prime is 22712329. The next prime is 22712341. The reversal of 22712340 is 4321722.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22712341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5550 + ... + 8730.

It is an arithmetic number, because the mean of its divisors is an integer number (801864).

Almost surely, 2^22712340 is an apocalyptic number.

22712340 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 22712340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38489472).

22712340 is an abundant number, since it is smaller than the sum of its proper divisors (54266604).

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

22712340 is a wasteful number, since it uses less digits than its factorization.

22712340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 22712340 is about 4765.7465312373. The cubic root of 22712340 is about 283.1961165639.

The spelling of 22712340 in words is "twenty-two million, seven hundred twelve thousand, three hundred forty".