15421448 has 64 divisors (see below), whose sum is σ = 35562240. Its totient is φ = 6119424.

The previous prime is 15421447. The next prime is 15421487. The reversal of 15421448 is 84412451.

It is a self number, because there is not a number n which added to its sum of digits gives 15421448.

It is not an unprimeable number, because it can be changed into a prime (15421447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92261 + ... + 92427.

It is an arithmetic number, because the mean of its divisors is an integer number (555660).

Almost surely, 2^15421448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15421448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17781120).

15421448 is an abundant number, since it is smaller than the sum of its proper divisors (20140792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15421448 is a wasteful number, since it uses less digits than its factorization.

15421448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 290 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 15421448 is about 3927.0151514859. The cubic root of 15421448 is about 248.9096407135.

Adding to 15421448 its reverse (84412451), we get a palindrome (99833899).

The spelling of 15421448 in words is "fifteen million, four hundred twenty-one thousand, four hundred forty-eight".