445820709 has 16 divisors (see below), whose sum is σ = 615405312. Its totient is φ = 286898688.

The previous prime is 445820701. The next prime is 445820719. The reversal of 445820709 is 907028544.

It is not a de Polignac number, because 445820709 - 2³ = 445820701 is a prime.

It is a super-2 number, since 2×445820709² = 397512209146525362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445820701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11364 + ... + 31949.

It is an arithmetic number, because the mean of its divisors is an integer number (38462832).

Almost surely, 2^445820709 is an apocalyptic number.

It is an amenable number.

445820709 is a deficient number, since it is larger than the sum of its proper divisors (169584603).

445820709 is a wasteful number, since it uses less digits than its factorization.

445820709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43436.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 445820709 is about 21114.4668178005. The cubic root of 445820709 is about 763.9297315059.

The spelling of 445820709 in words is "four hundred forty-five million, eight hundred twenty thousand, seven hundred nine".