15798394 has 4 divisors (see below), whose sum is σ = 23697594. Its totient is φ = 7899196.

The previous prime is 15798383. The next prime is 15798397. The reversal of 15798394 is 49389751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49389751 = 131 ⋅377021.

It can be written as a sum of positive squares in only one way, i.e., 15705369 + 93025 = 3963^2 + 305^2 .

It is not an unprimeable number, because it can be changed into a prime (15798397) 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 as a sum of consecutive naturals, namely, 3949597 + ... + 3949600.

Almost surely, 2^15798394 is an apocalyptic number.

15798394 is a deficient number, since it is larger than the sum of its proper divisors (7899200).

15798394 is an equidigital number, since it uses as much as digits as its factorization.

15798394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7899199.

The product of its digits is 272160, while the sum is 46.

The square root of 15798394 is about 3974.7193611625. The cubic root of 15798394 is about 250.9213681514.

The spelling of 15798394 in words is "fifteen million, seven hundred ninety-eight thousand, three hundred ninety-four".