445669869 has 8 divisors (see below), whose sum is σ = 594885280. Its totient is φ = 296783856.

The previous prime is 445669831. The next prime is 445669879. The reversal of 445669869 is 968966544.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-445669869 is a prime.

It is a super-2 number, since 2×445669869² = 397243264268954322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445669879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79174 + ... + 84615.

It is an arithmetic number, because the mean of its divisors is an integer number (74360660).

Almost surely, 2^445669869 is an apocalyptic number.

It is an amenable number.

445669869 is a deficient number, since it is larger than the sum of its proper divisors (149215411).

445669869 is a wasteful number, since it uses less digits than its factorization.

445669869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164699.

The product of its digits is 11197440, while the sum is 57.

The square root of 445669869 is about 21110.8945570764. The cubic root of 445669869 is about 763.8435652088.

The spelling of 445669869 in words is "four hundred forty-five million, six hundred sixty-nine thousand, eight hundred sixty-nine".