15238397 has 4 divisors (see below), whose sum is σ = 15900960. Its totient is φ = 14575836.

The previous prime is 15238393. The next prime is 15238403. The reversal of 15238397 is 79383251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 15238397 - 2² = 15238393 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 15238397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15238393) 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 3 ways as a sum of consecutive naturals, for example, 331247 + ... + 331292.

It is an arithmetic number, because the mean of its divisors is an integer number (3975240).

Almost surely, 2^15238397 is an apocalyptic number.

It is an amenable number.

15238397 is a deficient number, since it is larger than the sum of its proper divisors (662563).

15238397 is an equidigital number, since it uses as much as digits as its factorization.

15238397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662562.

The product of its digits is 45360, while the sum is 38.

The square root of 15238397 is about 3903.6389433450. The cubic root of 15238397 is about 247.9208742109.

The spelling of 15238397 in words is "fifteen million, two hundred thirty-eight thousand, three hundred ninety-seven".