1978724544 has 56 divisors (see below), whose sum is σ = 5404274688. Its totient is φ = 638296320.

The previous prime is 1978724521. The next prime is 1978724551. The reversal of 1978724544 is 4454278791.

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, 160272 + ... + 172175.

Almost surely, 2^1978724544 is an apocalyptic number.

It is an amenable number.

1978724544 is an abundant number, since it is smaller than the sum of its proper divisors (3425550144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1978724544 is a wasteful number, since it uses less digits than its factorization.

1978724544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332493 (or 332483 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 51.

The square root of 1978724544 is about 44482.8567427947. The cubic root of 1978724544 is about 1255.4375482110.

The spelling of 1978724544 in words is "one billion, nine hundred seventy-eight million, seven hundred twenty-four thousand, five hundred forty-four".