16461988 has 12 divisors (see below), whose sum is σ = 28976220. Its totient is φ = 8183072.

The previous prime is 16461979. The next prime is 16462007. The reversal of 16461988 is 88916461.

16461988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9290304 + 7171684 = 3048^2 + 2678^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11203 + ... + 12586.

It is an arithmetic number, because the mean of its divisors is an integer number (2414685).

Almost surely, 2^16461988 is an apocalyptic number.

It is an amenable number.

16461988 is a deficient number, since it is larger than the sum of its proper divisors (12514232).

16461988 is a wasteful number, since it uses less digits than its factorization.

16461988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23966 (or 23964 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 16461988 is about 4057.3375506605. The cubic root of 16461988 is about 254.3865196304.

The spelling of 16461988 in words is "sixteen million, four hundred sixty-one thousand, nine hundred eighty-eight".