16540540 has 24 divisors (see below), whose sum is σ = 34971552. Its totient is φ = 6571200.

The previous prime is 16540529. The next prime is 16540543. The reversal of 16540540 is 4504561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540543) 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, 282 + ... + 5758.

It is an arithmetic number, because the mean of its divisors is an integer number (1457148).

Almost surely, 2^16540540 is an apocalyptic number.

16540540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16540540 is an abundant number, since it is smaller than the sum of its proper divisors (18431012).

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

16540540 is a wasteful number, since it uses less digits than its factorization.

16540540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5637 (or 5635 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 16540540 is about 4067.0062699730. The cubic root of 16540540 is about 254.7904981806.

The spelling of 16540540 in words is "sixteen million, five hundred forty thousand, five hundred forty".