22871840 has 24 divisors (see below), whose sum is σ = 54035100. Its totient is φ = 9148672.

The previous prime is 22871803. The next prime is 22871861. The reversal of 22871840 is 4817822.

It can be written as a sum of positive squares in 2 ways, for example, as 22771984 + 99856 = 4772^2 + 316^2 .

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 = 22871797 and 22871806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71315 + ... + 71634.

Almost surely, 2^22871840 is an apocalyptic number.

22871840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22871840 is an abundant number, since it is smaller than the sum of its proper divisors (31163260).

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

22871840 is a wasteful number, since it uses less digits than its factorization.

22871840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142964 (or 142956 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 22871840 is about 4782.4512543255. The cubic root of 22871840 is about 283.8574964504.

The spelling of 22871840 in words is "twenty-two million, eight hundred seventy-one thousand, eight hundred forty".