44402381 has 2 divisors, whose sum is σ = 44402382. Its totient is φ = 44402380.

The previous prime is 44402363. The next prime is 44402383. The reversal of 44402381 is 18320444.

44402381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37332100 + 7070281 = 6110^2 + 2659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44402381 is a prime.

It is a super-2 number, since 2×44402381² = 3943142876938322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 44402383, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 44402381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44402383) by changing a digit.

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 as a sum of consecutive naturals, namely, 22201190 + 22201191.

It is an arithmetic number, because the mean of its divisors is an integer number (22201191).

Almost surely, 2^44402381 is an apocalyptic number.

It is an amenable number.

44402381 is a deficient number, since it is larger than the sum of its proper divisors (1).

44402381 is an equidigital number, since it uses as much as digits as its factorization.

44402381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 44402381 is about 6663.5111615424. The cubic root of 44402381 is about 354.1077400894.

The spelling of 44402381 in words is "forty-four million, four hundred two thousand, three hundred eighty-one".