2144269978 has 4 divisors (see below), whose sum is σ = 3216404970. Its totient is φ = 1072134988.

The previous prime is 2144269957. The next prime is 2144270021. The reversal of 2144269978 is 8799624412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1677148209 + 467121769 = 40953^2 + 21613^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536067493 + ... + 536067496.

Almost surely, 2^2144269978 is an apocalyptic number.

2144269978 is a deficient number, since it is larger than the sum of its proper divisors (1072134992).

2144269978 is a wasteful number, since it uses less digits than its factorization.

2144269978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072134991.

The product of its digits is 1741824, while the sum is 52.

The square root of 2144269978 is about 46306.2628377631. The cubic root of 2144269978 is about 1289.5152672708.

The spelling of 2144269978 in words is "two billion, one hundred forty-four million, two hundred sixty-nine thousand, nine hundred seventy-eight".