16912840 has 48 divisors (see below), whose sum is σ = 44271900. Its totient is φ = 5798016.

The previous prime is 16912817. The next prime is 16912853. The reversal of 16912840 is 4821961.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16826404 + 86436 = 4102^2 + 294^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2355 + ... + 6274.

Almost surely, 2^16912840 is an apocalyptic number.

16912840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16912840 is an abundant number, since it is smaller than the sum of its proper divisors (27359060).

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

16912840 is a wasteful number, since it uses less digits than its factorization.

16912840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8654 (or 8643 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 16912840 is about 4112.5223403649. The cubic root of 16912840 is about 256.6879688472.

The spelling of 16912840 in words is "sixteen million, nine hundred twelve thousand, eight hundred forty".