15309968 has 20 divisors (see below), whose sum is σ = 30295680. Its totient is φ = 7491744.

The previous prime is 15309967. The next prime is 15309997. The reversal of 15309968 is 86990351.

It is a super-2 number, since 2×15309968² = 468790240322048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15309967) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 9428 + ... + 10931.

It is an arithmetic number, because the mean of its divisors is an integer number (1514784).

Almost surely, 2^15309968 is an apocalyptic number.

It is an amenable number.

15309968 is a deficient number, since it is larger than the sum of its proper divisors (14985712).

15309968 is a wasteful number, since it uses less digits than its factorization.

15309968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20414 (or 20408 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 15309968 is about 3912.7954201568. The cubic root of 15309968 is about 248.3084092318.

The spelling of 15309968 in words is "fifteen million, three hundred nine thousand, nine hundred sixty-eight".