56440445 has 4 divisors (see below), whose sum is σ = 67728540. Its totient is φ = 45152352.

The previous prime is 56440441. The next prime is 56440463. The reversal of 56440445 is 54404465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29181604 + 27258841 = 5402^2 + 5221^2 .

It is a cyclic number.

It is not a de Polignac number, because 56440445 - 2² = 56440441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56440441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5644040 + ... + 5644049.

It is an arithmetic number, because the mean of its divisors is an integer number (16932135).

Almost surely, 2^56440445 is an apocalyptic number.

It is an amenable number.

56440445 is a deficient number, since it is larger than the sum of its proper divisors (11288095).

56440445 is a wasteful number, since it uses less digits than its factorization.

56440445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11288094.

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 56440445 is about 7512.6856050283. The cubic root of 56440445 is about 383.5866433277.

The spelling of 56440445 in words is "fifty-six million, four hundred forty thousand, four hundred forty-five".