44445889 has 2 divisors, whose sum is σ = 44445890. Its totient is φ = 44445888.

The previous prime is 44445859. The next prime is 44445901. The reversal of 44445889 is 98854444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 2455489 = 6480^2 + 1567^2 .

It is a cyclic number.

It is not a de Polignac number, because 44445889 - 2⁹ = 44445377 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (44445829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22222944 + 22222945.

It is an arithmetic number, because the mean of its divisors is an integer number (22222945).

Almost surely, 2^44445889 is an apocalyptic number.

It is an amenable number.

44445889 is a deficient number, since it is larger than the sum of its proper divisors (1).

44445889 is an equidigital number, since it uses as much as digits as its factorization.

44445889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 737280, while the sum is 46.

The square root of 44445889 is about 6666.7750074530. The cubic root of 44445889 is about 354.2233606926.

It can be divided in two parts, 44445 and 889, that multiplied together give a triangular number (39511605 = T₈₈₈₉).

The spelling of 44445889 in words is "forty-four million, four hundred forty-five thousand, eight hundred eighty-nine".