16649960 has 16 divisors (see below), whose sum is σ = 37462500. Its totient is φ = 6659968.

The previous prime is 16649959. The next prime is 16649989. The reversal of 16649960 is 6994661.

It can be written as a sum of positive squares in 2 ways, for example, as 15382084 + 1267876 = 3922^2 + 1126^2 .

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, 208085 + ... + 208164.

Almost surely, 2^16649960 is an apocalyptic number.

16649960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16649960 is an abundant number, since it is smaller than the sum of its proper divisors (20812540).

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

16649960 is a wasteful number, since it uses less digits than its factorization.

16649960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416260 (or 416256 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 16649960 is about 4080.4362511869. The cubic root of 16649960 is about 255.3510990887.

The spelling of 16649960 in words is "sixteen million, six hundred forty-nine thousand, nine hundred sixty".