2142389278 has 8 divisors (see below), whose sum is σ = 3213813960. Its totient is φ = 1071117960.

The previous prime is 2142389209. The next prime is 2142389279. The reversal of 2142389278 is 8729832412.

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

It is a super-2 number, since 2×2142389278² = 9179663636978722568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142389279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7588 + ... + 65896.

It is an arithmetic number, because the mean of its divisors is an integer number (401726745).

Almost surely, 2^2142389278 is an apocalyptic number.

2142389278 is a deficient number, since it is larger than the sum of its proper divisors (1071424682).

2142389278 is a wasteful number, since it uses less digits than its factorization.

2142389278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76682.

The product of its digits is 387072, while the sum is 46.

The square root of 2142389278 is about 46285.9511947200. The cubic root of 2142389278 is about 1289.1381535734.

The spelling of 2142389278 in words is "two billion, one hundred forty-two million, three hundred eighty-nine thousand, two hundred seventy-eight".