15489668 has 6 divisors (see below), whose sum is σ = 27106926. Its totient is φ = 7744832.

The previous prime is 15489653. The next prime is 15489671. The reversal of 15489668 is 86698451.

It can be written as a sum of positive squares in only one way, i.e., 15382084 + 107584 = 3922^2 + 328^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1936205 + ... + 1936212.

It is an arithmetic number, because the mean of its divisors is an integer number (4517821).

Almost surely, 2^15489668 is an apocalyptic number.

It is an amenable number.

15489668 is a deficient number, since it is larger than the sum of its proper divisors (11617258).

15489668 is a wasteful number, since it uses less digits than its factorization.

15489668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872421 (or 3872419 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The square root of 15489668 is about 3935.6915529548. The cubic root of 15489668 is about 249.2761354366.

The spelling of 15489668 in words is "fifteen million, four hundred eighty-nine thousand, six hundred sixty-eight".