16913440 has 48 divisors (see below), whose sum is σ = 41052312. Its totient is φ = 6580224.

The previous prime is 16913431. The next prime is 16913447. The reversal of 16913440 is 4431961.

It can be written as a sum of positive squares in 4 ways, for example, as 16548624 + 364816 = 4068^2 + 604^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16913399 and 16913408.

It is not an unprimeable number, because it can be changed into a prime (16913447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4492 + ... + 7348.

Almost surely, 2^16913440 is an apocalyptic number.

16913440 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 16913440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20526156).

16913440 is an abundant number, since it is smaller than the sum of its proper divisors (24138872).

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

16913440 is a wasteful number, since it uses less digits than its factorization.

16913440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2909 (or 2901 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 16913440 is about 4112.5952876499. The cubic root of 16913440 is about 256.6910042326.

The spelling of 16913440 in words is "sixteen million, nine hundred thirteen thousand, four hundred forty".