2123694328 has 64 divisors (see below), whose sum is σ = 4877084160. Its totient is φ = 847034496.

The previous prime is 2123694301. The next prime is 2123694329. The reversal of 2123694328 is 8234963212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123694329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25375 + ... + 69937.

It is an arithmetic number, because the mean of its divisors is an integer number (76204440).

Almost surely, 2^2123694328 is an apocalyptic number.

2123694328 is a gapful number since it is divisible by the number (28) 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 2123694328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2438542080).

2123694328 is an abundant number, since it is smaller than the sum of its proper divisors (2753389832).

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

2123694328 is a wasteful number, since it uses less digits than its factorization.

2123694328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44636 (or 44632 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 2123694328 is about 46083.5581091565. The cubic root of 2123694328 is about 1285.3774276260.

The spelling of 2123694328 in words is "two billion, one hundred twenty-three million, six hundred ninety-four thousand, three hundred twenty-eight".