2982193978 has 4 divisors (see below), whose sum is σ = 4473290970. Its totient is φ = 1491096988.

The previous prime is 2982193967. The next prime is 2982193997. The reversal of 2982193978 is 8793912892.

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., 2709514809 + 272679169 = 52053^2 + 16513^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745548493 + ... + 745548496.

Almost surely, 2^2982193978 is an apocalyptic number.

2982193978 is a deficient number, since it is larger than the sum of its proper divisors (1491096992).

2982193978 is a wasteful number, since it uses less digits than its factorization.

2982193978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491096991.

The product of its digits is 3919104, while the sum is 58.

The square root of 2982193978 is about 54609.4678421242. The cubic root of 2982193978 is about 1439.3904921147.

The spelling of 2982193978 in words is "two billion, nine hundred eighty-two million, one hundred ninety-three thousand, nine hundred seventy-eight".