22839840 has 192 divisors, whose sum is σ = 84913920. Its totient is φ = 5713920.

The previous prime is 22839833. The next prime is 22839871. The reversal of 22839840 is 4893822.

22839840 is a `hidden beast` number, since 228 + 398 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22839795 and 22839804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73285 + ... + 73595.

It is an arithmetic number, because the mean of its divisors is an integer number (442260).

Almost surely, 2^22839840 is an apocalyptic number.

22839840 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 22839840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42456960).

22839840 is an abundant number, since it is smaller than the sum of its proper divisors (62074080).

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

22839840 is a wasteful number, since it uses less digits than its factorization.

22839840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 22839840 is about 4779.1045186311. The cubic root of 22839840 is about 283.7250529537.

The spelling of 22839840 in words is "twenty-two million, eight hundred thirty-nine thousand, eight hundred forty".