22397140 has 12 divisors (see below), whose sum is σ = 47034036. Its totient is φ = 8958848.

The previous prime is 22397119. The next prime is 22397153. The reversal of 22397140 is 4179322.

It can be written as a sum of positive squares in 2 ways, for example, as 9523396 + 12873744 = 3086^2 + 3588^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22397099 and 22397108.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 559909 + ... + 559948.

It is an arithmetic number, because the mean of its divisors is an integer number (3919503).

Almost surely, 2^22397140 is an apocalyptic number.

22397140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22397140 is an abundant number, since it is smaller than the sum of its proper divisors (24636896).

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

22397140 is a wasteful number, since it uses less digits than its factorization.

22397140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119866 (or 1119864 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 22397140 is about 4732.5616741887. The cubic root of 22397140 is about 281.8799515848.

The spelling of 22397140 in words is "twenty-two million, three hundred ninety-seven thousand, one hundred forty".