1978482478 has 16 divisors (see below), whose sum is σ = 3434618880. Its totient is φ = 837187416.

The previous prime is 1978482449. The next prime is 1978482481. The reversal of 1978482478 is 8742848791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893326 + ... + 895537.

It is an arithmetic number, because the mean of its divisors is an integer number (214663680).

Almost surely, 2^1978482478 is an apocalyptic number.

1978482478 is a deficient number, since it is larger than the sum of its proper divisors (1456136402).

1978482478 is a wasteful number, since it uses less digits than its factorization.

1978482478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788951.

The product of its digits is 7225344, while the sum is 58.

The square root of 1978482478 is about 44480.1357686777. The cubic root of 1978482478 is about 1255.3863517404.

The spelling of 1978482478 in words is "one billion, nine hundred seventy-eight million, four hundred eighty-two thousand, four hundred seventy-eight".