15481232928 has 144 divisors (see below), whose sum is σ = 50537148480. Its totient is φ = 4403593728.

The previous prime is 15481232911. The next prime is 15481232929. The reversal of 15481232928 is 82923218451.

15481232928 is a `hidden beast` number, since 1 + 548 + 12 + 3 + 2 + 92 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (15481232929) 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, 440718 + ... + 474546.

It is an arithmetic number, because the mean of its divisors is an integer number (350952420).

Almost surely, 2^15481232928 is an apocalyptic number.

15481232928 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 15481232928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25268574240).

15481232928 is an abundant number, since it is smaller than the sum of its proper divisors (35055915552).

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

15481232928 is a wasteful number, since it uses less digits than its factorization.

15481232928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34079 (or 34068 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 15481232928 in words is "fifteen billion, four hundred eighty-one million, two hundred thirty-two thousand, nine hundred twenty-eight".