1017978038 has 64 divisors (see below), whose sum is σ = 1953331200. Its totient is φ = 394430400.

The previous prime is 1017978019. The next prime is 1017978083. The reversal of 1017978038 is 8308797101.

It is a self number, because there is not a number n which added to its sum of digits gives 1017978038.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2361683 + ... + 2362113.

It is an arithmetic number, because the mean of its divisors is an integer number (30520800).

Almost surely, 2^1017978038 is an apocalyptic number.

1017978038 is a deficient number, since it is larger than the sum of its proper divisors (935353162).

1017978038 is a wasteful number, since it uses less digits than its factorization.

1017978038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 44.

The square root of 1017978038 is about 31905.7680992011. The cubic root of 1017978038 is about 1005.9571215686.

The spelling of 1017978038 in words is "one billion, seventeen million, nine hundred seventy-eight thousand, thirty-eight".