2123234440 has 16 divisors (see below), whose sum is σ = 4777277580. Its totient is φ = 849293760.

The previous prime is 2123234429. The next prime is 2123234441. The reversal of 2123234440 is 444323212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1974735844 + 148498596 = 44438^2 + 12186^2 .

It is a super-2 number, since 2×2123234440² = 9016248974404227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2123234441) 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, 26540391 + ... + 26540470.

Almost surely, 2^2123234440 is an apocalyptic number.

2123234440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123234440 is an abundant number, since it is smaller than the sum of its proper divisors (2654043140).

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

2123234440 is a wasteful number, since it uses less digits than its factorization.

2123234440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53080872 (or 53080868 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 2123234440 is about 46078.5681201141. The cubic root of 2123234440 is about 1285.2846376983.

Adding to 2123234440 its reverse (444323212), we get a palindrome (2567557652).

The spelling of 2123234440 in words is "two billion, one hundred twenty-three million, two hundred thirty-four thousand, four hundred forty".