16871540 has 24 divisors (see below), whose sum is σ = 40492032. Its totient is φ = 5784480.

The previous prime is 16871539. The next prime is 16871549. The reversal of 16871540 is 4517861.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16871497 and 16871506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16871549) 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, 60116 + ... + 60395.

It is an arithmetic number, because the mean of its divisors is an integer number (1687168).

Almost surely, 2^16871540 is an apocalyptic number.

16871540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16871540 is an abundant number, since it is smaller than the sum of its proper divisors (23620492).

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

16871540 is a wasteful number, since it uses less digits than its factorization.

16871540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120527 (or 120525 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 16871540 is about 4107.4980219107. The cubic root of 16871540 is about 256.4788603832.

The spelling of 16871540 in words is "sixteen million, eight hundred seventy-one thousand, five hundred forty".