15434240 has 40 divisors (see below), whose sum is σ = 37012140. Its totient is φ = 6172672.

The previous prime is 15434233. The next prime is 15434269. The reversal of 15434240 is 4243451.

It can be written as a sum of positive squares in 2 ways, for example, as 14868736 + 565504 = 3856^2 + 752^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455 + ... + 5574.

Almost surely, 2^15434240 is an apocalyptic number.

15434240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15434240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18506070).

15434240 is an abundant number, since it is smaller than the sum of its proper divisors (21577900).

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

15434240 is an frugal number, since it uses more digits than its factorization.

15434240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052 (or 6036 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 15434240 is about 3928.6435318059. The cubic root of 15434240 is about 248.9784447183.

Adding to 15434240 its reverse (4243451), we get a palindrome (19677691).

The spelling of 15434240 in words is "fifteen million, four hundred thirty-four thousand, two hundred forty".