2123402240 has 88 divisors (see below), whose sum is σ = 5109508512. Its totient is φ = 846725120.

The previous prime is 2123402233. The next prime is 2123402261. The reversal of 2123402240 is 422043212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3281597 + ... + 3282243.

Almost surely, 2^2123402240 is an apocalyptic number.

2123402240 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 2123402240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2554754256).

2123402240 is an abundant number, since it is smaller than the sum of its proper divisors (2986106272).

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

2123402240 is an equidigital number, since it uses as much as digits as its factorization.

2123402240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2123402240 is about 46080.3888872479. The cubic root of 2123402240 is about 1285.3184956459.

Adding to 2123402240 its reverse (422043212), we get a palindrome (2545445452).

The spelling of 2123402240 in words is "two billion, one hundred twenty-three million, four hundred two thousand, two hundred forty".