1993281038 has 16 divisors (see below), whose sum is σ = 3448404960. Its totient is φ = 846425376.

The previous prime is 1993281019. The next prime is 1993281047. The reversal of 1993281038 is 8301823991.

It is a self number, because there is not a number n which added to its sum of digits gives 1993281038.

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 7 ways as a sum of consecutive naturals, for example, 651581 + ... + 654632.

It is an arithmetic number, because the mean of its divisors is an integer number (215525310).

Almost surely, 2^1993281038 is an apocalyptic number.

1993281038 is a deficient number, since it is larger than the sum of its proper divisors (1455123922).

1993281038 is a wasteful number, since it uses less digits than its factorization.

1993281038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306331.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 1993281038 is about 44646.1760736572. The cubic root of 1993281038 is about 1258.5085733732.

The spelling of 1993281038 in words is "one billion, nine hundred ninety-three million, two hundred eighty-one thousand, thirty-eight".