1988884161 has 24 divisors (see below), whose sum is σ = 3140616960. Its totient is φ = 1202839200.

The previous prime is 1988884151. The next prime is 1988884181. The reversal of 1988884161 is 1614888891.

It is a happy number.

It is not a de Polignac number, because 1988884161 - 2¹⁰ = 1988883137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1988884098 and 1988884107.

It is not an unprimeable number, because it can be changed into a prime (1988884151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26451 + ... + 68391.

It is an arithmetic number, because the mean of its divisors is an integer number (130859040).

Almost surely, 2^1988884161 is an apocalyptic number.

1988884161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1988884161 is a deficient number, since it is larger than the sum of its proper divisors (1151732799).

1988884161 is a wasteful number, since it uses less digits than its factorization.

1988884161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42437 (or 42434 counting only the distinct ones).

The product of its digits is 884736, while the sum is 54.

The square root of 1988884161 is about 44596.9075273163. The cubic root of 1988884161 is about 1257.5825321740.

The spelling of 1988884161 in words is "one billion, nine hundred eighty-eight million, eight hundred eighty-four thousand, one hundred sixty-one".