16540440 has 192 divisors, whose sum is σ = 60328800. Its totient is φ = 3612672.

The previous prime is 16540429. The next prime is 16540457. The reversal of 16540440 is 4404561.

16540440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16540440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170472 + ... + 170568.

Almost surely, 2^16540440 is an apocalyptic number.

16540440 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 16540440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30164400).

16540440 is an abundant number, since it is smaller than the sum of its proper divisors (43788360).

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

16540440 is a wasteful number, since it uses less digits than its factorization.

16540440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 16540440 is about 4066.9939758992. The cubic root of 16540440 is about 254.7899847128.

The spelling of 16540440 in words is "sixteen million, five hundred forty thousand, four hundred forty".