15481992 has 16 divisors (see below), whose sum is σ = 38705040. Its totient is φ = 5160656.

The previous prime is 15481981. The next prime is 15481993. The reversal of 15481992 is 29918451.

It is a self number, because there is not a number n which added to its sum of digits gives 15481992.

It is not an unprimeable number, because it can be changed into a prime (15481993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322518 + ... + 322565.

It is an arithmetic number, because the mean of its divisors is an integer number (2419065).

Almost surely, 2^15481992 is an apocalyptic number.

15481992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15481992 is an abundant number, since it is smaller than the sum of its proper divisors (23223048).

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

15481992 is a wasteful number, since it uses less digits than its factorization.

15481992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645092 (or 645088 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 15481992 is about 3934.7162540646. The cubic root of 15481992 is about 249.2349518602.

The spelling of 15481992 in words is "fifteen million, four hundred eighty-one thousand, nine hundred ninety-two".