15980044 has 24 divisors (see below), whose sum is σ = 29085840. Its totient is φ = 7672896.

The previous prime is 15980033. The next prime is 15980053. The reversal of 15980044 is 44008951.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15979988 and 15980015.

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 7 ways as a sum of consecutive naturals, for example, 40054 + ... + 40450.

It is an arithmetic number, because the mean of its divisors is an integer number (1211910).

Almost surely, 2^15980044 is an apocalyptic number.

It is an amenable number.

15980044 is a deficient number, since it is larger than the sum of its proper divisors (13105796).

15980044 is a wasteful number, since it uses less digits than its factorization.

15980044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 15980044 is about 3997.5047216983. The cubic root of 15980044 is about 251.8794039585.

Adding to 15980044 its reverse (44008951), we get a palindrome (59988995).

The spelling of 15980044 in words is "fifteen million, nine hundred eighty thousand, forty-four".