2129879378 has 8 divisors (see below), whose sum is σ = 3485257200. Its totient is φ = 968126980.

The previous prime is 2129879377. The next prime is 2129879387. The reversal of 2129879378 is 8739789212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2129879377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48406328 + ... + 48406371.

It is an arithmetic number, because the mean of its divisors is an integer number (435657150).

Almost surely, 2^2129879378 is an apocalyptic number.

2129879378 is a deficient number, since it is larger than the sum of its proper divisors (1355377822).

2129879378 is a wasteful number, since it uses less digits than its factorization.

2129879378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96812712.

The product of its digits is 3048192, while the sum is 56.

The square root of 2129879378 is about 46150.6162255717. The cubic root of 2129879378 is about 1286.6240631131.

The spelling of 2129879378 in words is "two billion, one hundred twenty-nine million, eight hundred seventy-nine thousand, three hundred seventy-eight".