22903840 has 48 divisors (see below), whose sum is σ = 54418392. Its totient is φ = 9109504.

The previous prime is 22903813. The next prime is 22903847. The reversal of 22903840 is 4830922.

It can be written as a sum of positive squares in 4 ways, for example, as 19820304 + 3083536 = 4452^2 + 1756^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22903799 and 22903808.

It is not an unprimeable number, because it can be changed into a prime (22903847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40842 + ... + 41398.

Almost surely, 2^22903840 is an apocalyptic number.

22903840 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 22903840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27209196).

22903840 is an abundant number, since it is smaller than the sum of its proper divisors (31514552).

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

22903840 is a wasteful number, since it uses less digits than its factorization.

22903840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 22903840 is about 4785.7956496282. The cubic root of 22903840 is about 283.9898164701.

The spelling of 22903840 in words is "twenty-two million, nine hundred three thousand, eight hundred forty".