22953840 has 160 divisors (see below), whose sum is σ = 87661056. Its totient is φ = 4838400.

The previous prime is 22953829. The next prime is 22953841. The reversal of 22953840 is 4835922.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22953841) 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, 21315 + ... + 22365.

Almost surely, 2^22953840 is an apocalyptic number.

22953840 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 22953840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43830528).

22953840 is an abundant number, since it is smaller than the sum of its proper divisors (64707216).

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

22953840 is a wasteful number, since it uses less digits than its factorization.

22953840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 22953840 is about 4791.0165935843. The cubic root of 22953840 is about 284.1963199888.

The spelling of 22953840 in words is "twenty-two million, nine hundred fifty-three thousand, eight hundred forty".