15421488 has 40 divisors (see below), whose sum is σ = 40245936. Its totient is φ = 5088000.

The previous prime is 15421487. The next prime is 15421493. The reversal of 15421488 is 88412451.

It is not an unprimeable number, because it can be changed into a prime (15421487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3258 + ... + 6438.

Almost surely, 2^15421488 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 15421488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20122968).

15421488 is an abundant number, since it is smaller than the sum of its proper divisors (24824448).

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

15421488 is a wasteful number, since it uses less digits than its factorization.

15421488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293 (or 3287 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 15421488 is about 3927.0202444092. The cubic root of 15421488 is about 248.9098559198.

The spelling of 15421488 in words is "fifteen million, four hundred twenty-one thousand, four hundred eighty-eight".