22971840 has 56 divisors (see below), whose sum is σ = 72938640. Its totient is φ = 6125568.

The previous prime is 22971833. The next prime is 22971841. The reversal of 22971840 is 4817922.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22971841) 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 7 ways as a sum of consecutive naturals, for example, 11005 + ... + 12924.

Almost surely, 2^22971840 is an apocalyptic number.

22971840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22971840 is an abundant number, since it is smaller than the sum of its proper divisors (49966800).

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

22971840 is a wasteful number, since it uses less digits than its factorization.

22971840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23949 (or 23939 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 22971840 is about 4792.8947411768. The cubic root of 22971840 is about 284.2705878407.

The spelling of 22971840 in words is "twenty-two million, nine hundred seventy-one thousand, eight hundred forty".