15540480 has 216 divisors, whose sum is σ = 57395520. Its totient is φ = 3870720.

The previous prime is 15540451. The next prime is 15540487. The reversal of 15540480 is 8404551.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218845 + ... + 218915.

It is an arithmetic number, because the mean of its divisors is an integer number (265720).

Almost surely, 2^15540480 is an apocalyptic number.

15540480 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 15540480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28697760).

15540480 is an abundant number, since it is smaller than the sum of its proper divisors (41855040).

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

15540480 is a wasteful number, since it uses less digits than its factorization.

15540480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 100 counting only the distinct ones).

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

The square root of 15540480 is about 3942.1415499700. The cubic root of 15540480 is about 249.5484114289.

The spelling of 15540480 in words is "fifteen million, five hundred forty thousand, four hundred eighty".