1978042984 has 16 divisors (see below), whose sum is σ = 3745553220. Its totient is φ = 979228800.

The previous prime is 1978042961. The next prime is 1978043017. The reversal of 1978042984 is 4892408791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1703212900 + 274830084 = 41270^2 + 16578^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223229 + ... + 1224844.

Almost surely, 2^1978042984 is an apocalyptic number.

It is an amenable number.

1978042984 is a deficient number, since it is larger than the sum of its proper divisors (1767510236).

1978042984 is a wasteful number, since it uses less digits than its factorization.

1978042984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448180 (or 2448176 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 1978042984 is about 44475.1951541531. The cubic root of 1978042984 is about 1255.2933889715.

The spelling of 1978042984 in words is "one billion, nine hundred seventy-eight million, forty-two thousand, nine hundred eighty-four".