2129043428 has 6 divisors (see below), whose sum is σ = 3725826006. Its totient is φ = 1064521712.

The previous prime is 2129043377. The next prime is 2129043437. The reversal of 2129043428 is 8243409212.

It can be written as a sum of positive squares in only one way, i.e., 1225560064 + 903483364 = 35008^2 + 30058^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266130425 + ... + 266130432.

It is an arithmetic number, because the mean of its divisors is an integer number (620971001).

Almost surely, 2^2129043428 is an apocalyptic number.

It is an amenable number.

2129043428 is a deficient number, since it is larger than the sum of its proper divisors (1596782578).

2129043428 is a wasteful number, since it uses less digits than its factorization.

2129043428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532260861 (or 532260859 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 2129043428 is about 46141.5585779241. The cubic root of 2129043428 is about 1286.4557133400.

The spelling of 2129043428 in words is "two billion, one hundred twenty-nine million, forty-three thousand, four hundred twenty-eight".