16449680 has 40 divisors (see below), whose sum is σ = 41190072. Its totient is φ = 6073344.

The previous prime is 16449661. The next prime is 16449683. The reversal of 16449680 is 8694461.

It can be written as a sum of positive squares in 4 ways, for example, as 1948816 + 14500864 = 1396^2 + 3808^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (16449683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6869 + ... + 8948.

Almost surely, 2^16449680 is an apocalyptic number.

16449680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16449680 is an abundant number, since it is smaller than the sum of its proper divisors (24740392).

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

16449680 is a wasteful number, since it uses less digits than its factorization.

16449680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15843 (or 15837 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 16449680 is about 4055.8205088490. The cubic root of 16449680 is about 254.3231054604.

The spelling of 16449680 in words is "sixteen million, four hundred forty-nine thousand, six hundred eighty".