22390340 has 24 divisors (see below), whose sum is σ = 53737152. Its totient is φ = 7676640.

The previous prime is 22390337. The next prime is 22390363. The reversal of 22390340 is 4309322.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 79826 + ... + 80105.

It is an arithmetic number, because the mean of its divisors is an integer number (2239048).

Almost surely, 2^22390340 is an apocalyptic number.

22390340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22390340 is an abundant number, since it is smaller than the sum of its proper divisors (31346812).

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

22390340 is a wasteful number, since it uses less digits than its factorization.

22390340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159947 (or 159945 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 22390340 is about 4731.8431926682. The cubic root of 22390340 is about 281.8514214885.

Adding to 22390340 its reverse (4309322), we get a palindrome (26699662).

The spelling of 22390340 in words is "twenty-two million, three hundred ninety thousand, three hundred forty".