2129789028 has 24 divisors (see below), whose sum is σ = 4975569088. Its totient is φ = 709063776.

The previous prime is 2129789023. The next prime is 2129789117. The reversal of 2129789028 is 8209879212.

It is not an unprimeable number, because it can be changed into a prime (2129789023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97951 + ... + 117702.

Almost surely, 2^2129789028 is an apocalyptic number.

It is an amenable number.

2129789028 is an abundant number, since it is smaller than the sum of its proper divisors (2845780060).

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

2129789028 is a wasteful number, since it uses less digits than its factorization.

2129789028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216483 (or 216481 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 2129789028 is about 46149.6373550215. The cubic root of 2129789028 is about 1286.6058698875.

The spelling of 2129789028 in words is "two billion, one hundred twenty-nine million, seven hundred eighty-nine thousand, twenty-eight".