44180381 has 4 divisors (see below), whose sum is σ = 50491872. Its totient is φ = 37868892.

The previous prime is 44180359. The next prime is 44180413. The reversal of 44180381 is 18308144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44180381 is a prime.

It is a super-2 number, since 2×44180381² = 3903812130610322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44180341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3155735 + ... + 3155748.

It is an arithmetic number, because the mean of its divisors is an integer number (12622968).

Almost surely, 2^44180381 is an apocalyptic number.

It is an amenable number.

44180381 is a deficient number, since it is larger than the sum of its proper divisors (6311491).

44180381 is an equidigital number, since it uses as much as digits as its factorization.

44180381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6311490.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 44180381 is about 6646.8324034836. The cubic root of 44180381 is about 353.5166059018.

The spelling of 44180381 in words is "forty-four million, one hundred eighty thousand, three hundred eighty-one".