2123443400 has 48 divisors (see below), whose sum is σ = 5316782100. Its totient is φ = 784039680.

The previous prime is 2123443379. The next prime is 2123443411. The reversal of 2123443400 is 43443212.

It can be written as a sum of positive squares in 6 ways, for example, as 920879716 + 1202563684 = 30346^2 + 34678^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405755 + ... + 410954.

Almost surely, 2^2123443400 is an apocalyptic number.

2123443400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123443400 is an abundant number, since it is smaller than the sum of its proper divisors (3193338700).

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

2123443400 is a wasteful number, since it uses less digits than its factorization.

2123443400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816738 (or 816729 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2123443400 is about 46080.8354958979. The cubic root of 2123443400 is about 1285.3268004576.

Adding to 2123443400 its reverse (43443212), we get a palindrome (2166886612).

The spelling of 2123443400 in words is "two billion, one hundred twenty-three million, four hundred forty-three thousand, four hundred".