22943840 has 48 divisors (see below), whose sum is σ = 54559008. Its totient is φ = 9117696.

The previous prime is 22943831. The next prime is 22943873. The reversal of 22943840 is 4834922.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 22943797 and 22943806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30509 + ... + 31251.

It is an arithmetic number, because the mean of its divisors is an integer number (1136646).

Almost surely, 2^22943840 is an apocalyptic number.

22943840 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 22943840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27279504).

22943840 is an abundant number, since it is smaller than the sum of its proper divisors (31615168).

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

22943840 is a wasteful number, since it uses less digits than its factorization.

22943840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 22943840 is about 4789.9728600484. The cubic root of 22943840 is about 284.1550432931.

The spelling of 22943840 in words is "twenty-two million, nine hundred forty-three thousand, eight hundred forty".