3891469945 has 8 divisors (see below), whose sum is σ = 5094288000. Its totient is φ = 2830159920.

The previous prime is 3891469937. The next prime is 3891469957. The reversal of 3891469945 is 5499641983.

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

It is not a de Polignac number, because 3891469945 - 2³ = 3891469937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3891469945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35376945 + ... + 35377054.

It is an arithmetic number, because the mean of its divisors is an integer number (636786000).

Almost surely, 2^3891469945 is an apocalyptic number.

It is an amenable number.

3891469945 is a deficient number, since it is larger than the sum of its proper divisors (1202818055).

3891469945 is a wasteful number, since it uses less digits than its factorization.

3891469945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70754015.

The product of its digits is 8398080, while the sum is 58.

The square root of 3891469945 is about 62381.6475014888. The cubic root of 3891469945 is about 1572.9124869625.

The spelling of 3891469945 in words is "three billion, eight hundred ninety-one million, four hundred sixty-nine thousand, nine hundred forty-five".