22831240 has 16 divisors (see below), whose sum is σ = 51370380. Its totient is φ = 9132480.

The previous prime is 22831229. The next prime is 22831241. The reversal of 22831240 is 4213822.

It can be written as a sum of positive squares in 2 ways, for example, as 21921124 + 910116 = 4682^2 + 954^2 .

It is not an unprimeable number, because it can be changed into a prime (22831241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285351 + ... + 285430.

Almost surely, 2^22831240 is an apocalyptic number.

22831240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22831240 is an abundant number, since it is smaller than the sum of its proper divisors (28539140).

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

22831240 is a wasteful number, since it uses less digits than its factorization.

22831240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570792 (or 570788 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 22831240 is about 4778.2046837698. The cubic root of 22831240 is about 283.6894376754.

The spelling of 22831240 in words is "twenty-two million, eight hundred thirty-one thousand, two hundred forty".