15238891 has 8 divisors (see below), whose sum is σ = 15869520. Its totient is φ = 14615328.

The previous prime is 15238889. The next prime is 15238897. The reversal of 15238891 is 19883251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15238891 - 2¹ = 15238889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15238891.

It is not an unprimeable number, because it can be changed into a prime (15238897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2880 + ... + 6226.

It is an arithmetic number, because the mean of its divisors is an integer number (1983690).

Almost surely, 2^15238891 is an apocalyptic number.

15238891 is a deficient number, since it is larger than the sum of its proper divisors (630629).

15238891 is a wasteful number, since it uses less digits than its factorization.

15238891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533.

The product of its digits is 17280, while the sum is 37.

The square root of 15238891 is about 3903.7022171267. The cubic root of 15238891 is about 247.9235532238.

It can be divided in two parts, 15238 and 891, that added together give a square (16129 = 127²).

The spelling of 15238891 in words is "fifteen million, two hundred thirty-eight thousand, eight hundred ninety-one".