44420381 has 2 divisors, whose sum is σ = 44420382. Its totient is φ = 44420380.

The previous prime is 44420351. The next prime is 44420399. The reversal of 44420381 is 18302444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23863225 + 20557156 = 4885^2 + 4534^2 .

It is a cyclic number.

It is not a de Polignac number, because 44420381 - 2⁶ = 44420317 is a prime.

It is a super-2 number, since 2×44420381² = 3946340496370322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 44420381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44420351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22210190 + 22210191.

It is an arithmetic number, because the mean of its divisors is an integer number (22210191).

Almost surely, 2^44420381 is an apocalyptic number.

It is an amenable number.

44420381 is a deficient number, since it is larger than the sum of its proper divisors (1).

44420381 is an equidigital number, since it uses as much as digits as its factorization.

44420381 is an evil number, because the sum of its binary digits is even.

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

The square root of 44420381 is about 6664.8616639807. The cubic root of 44420381 is about 354.1555834563.

The spelling of 44420381 in words is "forty-four million, four hundred twenty thousand, three hundred eighty-one".