445057057 has 4 divisors (see below), whose sum is σ = 445099396.
Its totient is φ = 445014720.
The previous prime is 445057027. The next prime is 445057079. The reversal of 445057057 is 750750544.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in 2 ways, for example, as 68541841 + 376515216 = 8279^2 + 19404^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-445057057 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (445057027) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7957 + ... + 30877.
It is an arithmetic number, because the mean of its divisors is an integer number (111274849).
It is a 10512-hyperperfect number.
Almost surely, 2445057057 is an apocalyptic number.
It is an amenable number.
445057057 is a deficient number, since it is larger than the sum of its proper divisors (42339).
445057057 is a wasteful number, since it uses less digits than its factorization.
445057057 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 42338.
The product of its (nonzero) digits is 98000, while the sum is 37.
The square root of 445057057 is about 21096.3754469814.
The cubic root of 445057057 is about 763.4933005492.
The spelling of 445057057 in words is "four hundred forty-five million, fifty-seven thousand, fifty-seven".