22309940 has 12 divisors (see below), whose sum is σ = 46850916. Its totient is φ = 8923968.

The previous prime is 22309909. The next prime is 22309943. The reversal of 22309940 is 4990322.

It can be written as a sum of positive squares in 2 ways, for example, as 17522596 + 4787344 = 4186^2 + 2188^2 .

It is a super-3 number, since 3×22309940³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22309943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557729 + ... + 557768.

It is an arithmetic number, because the mean of its divisors is an integer number (3904243).

Almost surely, 2^22309940 is an apocalyptic number.

22309940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22309940 is an abundant number, since it is smaller than the sum of its proper divisors (24540976).

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

22309940 is a wasteful number, since it uses less digits than its factorization.

22309940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115506 (or 1115504 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 22309940 is about 4723.3399200142. The cubic root of 22309940 is about 281.5136562987.

The spelling of 22309940 in words is "twenty-two million, three hundred nine thousand, nine hundred forty".