39446561 has 16 divisors (see below), whose sum is σ = 49351680. Its totient is φ = 30630480.

The previous prime is 39446557. The next prime is 39446573. The reversal of 39446561 is 16564493.

It is a cyclic number.

It is not a de Polignac number, because 39446561 - 2² = 39446557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39446501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26930 + ... + 28356.

It is an arithmetic number, because the mean of its divisors is an integer number (3084480).

Almost surely, 2^39446561 is an apocalyptic number.

It is an amenable number.

39446561 is a deficient number, since it is larger than the sum of its proper divisors (9905119).

39446561 is a wasteful number, since it uses less digits than its factorization.

39446561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804.

The product of its digits is 77760, while the sum is 38.

The square root of 39446561 is about 6280.6497275362. The cubic root of 39446561 is about 340.4105795378.

The spelling of 39446561 in words is "thirty-nine million, four hundred forty-six thousand, five hundred sixty-one".