15981048 has 48 divisors (see below), whose sum is σ = 43566120. Its totient is φ = 5292096.

The previous prime is 15981047. The next prime is 15981101. The reversal of 15981048 is 84018951.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15981047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11815 + ... + 13097.

Almost surely, 2^15981048 is an apocalyptic number.

15981048 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 15981048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21783060).

15981048 is an abundant number, since it is smaller than the sum of its proper divisors (27585072).

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

15981048 is a wasteful number, since it uses less digits than its factorization.

15981048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468 (or 1461 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 15981048 is about 3997.6302980641. The cubic root of 15981048 is about 251.8846789049.

Adding to 15981048 its reverse (84018951), we get a palindrome (99999999).

The spelling of 15981048 in words is "fifteen million, nine hundred eighty-one thousand, forty-eight".