16003648 has 14 divisors (see below), whose sum is σ = 31757366. Its totient is φ = 8001792.

The previous prime is 16003639. The next prime is 16003649. The reversal of 16003648 is 84630061.

It can be written as a sum of positive squares in only one way, i.e., 13017664 + 2985984 = 3608^2 + 1728^2 .

It is a super-2 number, since 2×16003648² = 512233498615808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16003649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124965 + ... + 125092.

Almost surely, 2^16003648 is an apocalyptic number.

It is an amenable number.

16003648 is a deficient number, since it is larger than the sum of its proper divisors (15753718).

16003648 is an equidigital number, since it uses as much as digits as its factorization.

16003648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250069 (or 250059 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16003648 is about 4000.4559740110. The cubic root of 16003648 is about 252.0033593237.

The spelling of 16003648 in words is "sixteen million, three thousand, six hundred forty-eight".