15388961 has 12 divisors (see below), whose sum is σ = 18685248. Its totient is φ = 12412992.

The previous prime is 15388957. The next prime is 15388991. The reversal of 15388961 is 16988351.

It is not a de Polignac number, because 15388961 - 2² = 15388957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15388931) 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 11 ways as a sum of consecutive naturals, for example, 1781 + ... + 5826.

It is an arithmetic number, because the mean of its divisors is an integer number (1557104).

Almost surely, 2^15388961 is an apocalyptic number.

It is an amenable number.

15388961 is a deficient number, since it is larger than the sum of its proper divisors (3296287).

15388961 is an equidigital number, since it uses as much as digits as its factorization.

15388961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7648 (or 7631 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 15388961 is about 3922.8766230918. The cubic root of 15388961 is about 248.7347325293.

The spelling of 15388961 in words is "fifteen million, three hundred eighty-eight thousand, nine hundred sixty-one".