13120044 has 72 divisors (see below), whose sum is σ = 36369648. Its totient is φ = 3669120.

The previous prime is 13119983. The next prime is 13120057. The reversal of 13120044 is 44002131.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30954 + ... + 31374.

It is an arithmetic number, because the mean of its divisors is an integer number (505134).

Almost surely, 2^13120044 is an apocalyptic number.

13120044 is a gapful number since it is divisible by the number (14) 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 13120044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18184824).

13120044 is an abundant number, since it is smaller than the sum of its proper divisors (23249604).

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

13120044 is a wasteful number, since it uses less digits than its factorization.

13120044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 13120044 is about 3622.1601289838. The cubic root of 13120044 is about 235.8550052573.

Adding to 13120044 its reverse (44002131), we get a palindrome (57122175).

The spelling of 13120044 in words is "thirteen million, one hundred twenty thousand, forty-four".