16481440 has 48 divisors (see below), whose sum is σ = 39191040. Its totient is φ = 6549760.

The previous prime is 16481401. The next prime is 16481441. The reversal of 16481440 is 4418461.

It is a junction number, because it is equal to n+sod(n) for n = 16481399 and 16481408.

It is not an unprimeable number, because it can be changed into a prime (16481441) 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, 38025 + ... + 38455.

It is an arithmetic number, because the mean of its divisors is an integer number (816480).

Almost surely, 2^16481440 is an apocalyptic number.

16481440 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 16481440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19595520).

16481440 is an abundant number, since it is smaller than the sum of its proper divisors (22709600).

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

16481440 is a wasteful number, since it uses less digits than its factorization.

16481440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 16481440 is about 4059.7339814328. The cubic root of 16481440 is about 254.4866772141.

The spelling of 16481440 in words is "sixteen million, four hundred eighty-one thousand, four hundred forty".