16487289 has 48 divisors (see below), whose sum is σ = 30086784. Its totient is φ = 8467200.

The previous prime is 16487249. The next prime is 16487291. The reversal of 16487289 is 98278461.

It is not a de Polignac number, because 16487289 - 2⁸ = 16487033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16487209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33334 + ... + 33824.

It is an arithmetic number, because the mean of its divisors is an integer number (626808).

Almost surely, 2^16487289 is an apocalyptic number.

It is an amenable number.

16487289 is a deficient number, since it is larger than the sum of its proper divisors (13599495).

16487289 is a wasteful number, since it uses less digits than its factorization.

16487289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 555 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 16487289 is about 4060.4542849292. The cubic root of 16487289 is about 254.5167780736.

The spelling of 16487289 in words is "sixteen million, four hundred eighty-seven thousand, two hundred eighty-nine".