16447040 has 56 divisors (see below), whose sum is σ = 39624000. Its totient is φ = 6501888.

The previous prime is 16447033. The next prime is 16447043. The reversal of 16447040 is 4074461.

It is not an unprimeable number, because it can be changed into a prime (16447043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32711 + ... + 33209.

Almost surely, 2^16447040 is an apocalyptic number.

16447040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16447040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19812000).

16447040 is an abundant number, since it is smaller than the sum of its proper divisors (23176960).

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

16447040 is a wasteful number, since it uses less digits than its factorization.

16447040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 16447040 is about 4055.4950376002. The cubic root of 16447040 is about 254.3094993412.

The spelling of 16447040 in words is "sixteen million, four hundred forty-seven thousand, forty".