15540048 has 60 divisors (see below), whose sum is σ = 43756128. Its totient is φ = 5148480.

The previous prime is 15540029. The next prime is 15540067. The reversal of 15540048 is 84004551.

It is an interprime number because it is at equal distance from previous prime (15540029) and next prime (15540067).

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 in 11 ways as a sum of consecutive naturals, for example, 44611 + ... + 44957.

Almost surely, 2^15540048 is an apocalyptic number.

15540048 is a gapful number since it is divisible by the number (18) 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 15540048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21878064).

15540048 is an abundant number, since it is smaller than the sum of its proper divisors (28216080).

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

15540048 is a wasteful number, since it uses less digits than its factorization.

15540048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 15540048 is about 3942.0867570362. The cubic root of 15540048 is about 249.5460990612.

Adding to 15540048 its reverse (84004551), we get a palindrome (99544599).

The spelling of 15540048 in words is "fifteen million, five hundred forty thousand, forty-eight".