16887144 has 16 divisors (see below), whose sum is σ = 42217920. Its totient is φ = 5629040.

The previous prime is 16887139. The next prime is 16887151. The reversal of 16887144 is 44178861.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351792 + ... + 351839.

It is an arithmetic number, because the mean of its divisors is an integer number (2638620).

Almost surely, 2^16887144 is an apocalyptic number.

It is an amenable number.

16887144 is an abundant number, since it is smaller than the sum of its proper divisors (25330776).

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

16887144 is a wasteful number, since it uses less digits than its factorization.

16887144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703640 (or 703636 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 16887144 is about 4109.3970360626. The cubic root of 16887144 is about 256.5579059823.

The spelling of 16887144 in words is "sixteen million, eight hundred eighty-seven thousand, one hundred forty-four".