445730857 has 8 divisors (see below), whose sum is σ = 523656000. Its totient is φ = 374039760.

The previous prime is 445730851. The next prime is 445730881. The reversal of 445730857 is 758037544.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 445730857 - 2²³ = 437342249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445730851) 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 7 ways as a sum of consecutive naturals, for example, 1558357 + ... + 1558642.

It is an arithmetic number, because the mean of its divisors is an integer number (65457000).

Almost surely, 2^445730857 is an apocalyptic number.

It is an amenable number.

445730857 is a deficient number, since it is larger than the sum of its proper divisors (77925143).

445730857 is a wasteful number, since it uses less digits than its factorization.

445730857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117023.

The product of its (nonzero) digits is 470400, while the sum is 43.

The square root of 445730857 is about 21112.3389751112. The cubic root of 445730857 is about 763.8784065191.

The spelling of 445730857 in words is "four hundred forty-five million, seven hundred thirty thousand, eight hundred fifty-seven".