2129042428 has 48 divisors (see below), whose sum is σ = 3915233280. Its totient is φ = 1011816000.

The previous prime is 2129042417. The next prime is 2129042431. The reversal of 2129042428 is 8242409212.

It is a junction number, because it is equal to n+sod(n) for n = 2129042393 and 2129042402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1740225 + ... + 1741447.

It is an arithmetic number, because the mean of its divisors is an integer number (81567360).

Almost surely, 2^2129042428 is an apocalyptic number.

It is an amenable number.

2129042428 is a deficient number, since it is larger than the sum of its proper divisors (1786190852).

2129042428 is a wasteful number, since it uses less digits than its factorization.

2129042428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498 (or 1496 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 2129042428 is about 46141.5477417045. The cubic root of 2129042428 is about 1286.4555119263.

The spelling of 2129042428 in words is "two billion, one hundred twenty-nine million, forty-two thousand, four hundred twenty-eight".