44398561 has 2 divisors, whose sum is σ = 44398562. Its totient is φ = 44398560.

The previous prime is 44398537. The next prime is 44398567. The reversal of 44398561 is 16589344.

44398561 = T₅₄₃₉ + T₅₄₄₀ + T₅₄₄₁.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29767936 + 14630625 = 5456^2 + 3825^2 .

It is a cyclic number.

It is not a de Polignac number, because 44398561 - 2⁷ = 44398433 is a prime.

It is not a weakly prime, because it can be changed into another prime (44398567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22199280 + 22199281.

It is an arithmetic number, because the mean of its divisors is an integer number (22199281).

Almost surely, 2^44398561 is an apocalyptic number.

44398561 is the 5441-st centered triangular number.

It is an amenable number.

44398561 is a deficient number, since it is larger than the sum of its proper divisors (1).

44398561 is an equidigital number, since it uses as much as digits as its factorization.

44398561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 44398561 is about 6663.2245197052. The cubic root of 44398561 is about 354.0975850006.

Adding to 44398561 its product of digits (103680), we get a square (44502241 = 6671²).

The spelling of 44398561 in words is "forty-four million, three hundred ninety-eight thousand, five hundred sixty-one".