1501120044 has 72 divisors (see below), whose sum is σ = 3992247168. Its totient is φ = 474958080.

The previous prime is 1501120039. The next prime is 1501120057. The reversal of 1501120044 is 4400211051.

1501120044 is a `hidden beast` number, since 1 + 501 + 120 + 0 + 44 = 666.

It is a super-2 number, since 2×1501120044² = 4506722772997123872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1501119999 and 1501120026.

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, 40869 + ... + 68355.

Almost surely, 2^1501120044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1501120044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1996123584).

1501120044 is an abundant number, since it is smaller than the sum of its proper divisors (2491127124).

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

1501120044 is a wasteful number, since it uses less digits than its factorization.

1501120044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27575 (or 27570 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1501120044 is about 38744.2904696937. The cubic root of 1501120044 is about 1144.9990895157. Note that the first 3 decimals are identical.

Adding to 1501120044 its reverse (4400211051), we get a palindrome (5901331095).

The spelling of 1501120044 in words is "one billion, five hundred one million, one hundred twenty thousand, forty-four".