1993904164 has 24 divisors (see below), whose sum is σ = 4125320640. Its totient is φ = 825063456.

The previous prime is 1993904141. The next prime is 1993904167. The reversal of 1993904164 is 4614093991.

It is not an unprimeable number, because it can be changed into a prime (1993904167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226962 + ... + 1228585.

It is an arithmetic number, because the mean of its divisors is an integer number (171888360).

Almost surely, 2^1993904164 is an apocalyptic number.

1993904164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1993904164 is an abundant number, since it is smaller than the sum of its proper divisors (2131416476).

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

1993904164 is a wasteful number, since it uses less digits than its factorization.

1993904164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455587 (or 2455585 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 1993904164 is about 44653.1540207408. The cubic root of 1993904164 is about 1258.6397018483.

The spelling of 1993904164 in words is "one billion, nine hundred ninety-three million, nine hundred four thousand, one hundred sixty-four".