15440422 has 4 divisors (see below), whose sum is σ = 23160636. Its totient is φ = 7720210.

The previous prime is 15440419. The next prime is 15440431. The reversal of 15440422 is 22404451.

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: 22404451 = 127 ⋅176413.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 15440393 and 15440402.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3860104 + ... + 3860107.

It is an arithmetic number, because the mean of its divisors is an integer number (5790159).

Almost surely, 2^15440422 is an apocalyptic number.

15440422 is a deficient number, since it is larger than the sum of its proper divisors (7720214).

15440422 is an equidigital number, since it uses as much as digits as its factorization.

15440422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7720213.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 15440422 is about 3929.4302385969. The cubic root of 15440422 is about 249.0116820592.

Adding to 15440422 its reverse (22404451), we get a palindrome (37844873).

The spelling of 15440422 in words is "fifteen million, four hundred forty thousand, four hundred twenty-two".