3020891649 has 8 divisors (see below), whose sum is σ = 4029444672. Its totient is φ = 2013133200.

The previous prime is 3020891647. The next prime is 3020891683. The reversal of 3020891649 is 9461980203.

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

It is not a de Polignac number, because 3020891649 - 2¹ = 3020891647 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3020891649.

It is not an unprimeable number, because it can be changed into a prime (3020891641) 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, 189714 + ... + 205019.

It is an arithmetic number, because the mean of its divisors is an integer number (503680584).

Almost surely, 2^3020891649 is an apocalyptic number.

It is an amenable number.

3020891649 is a deficient number, since it is larger than the sum of its proper divisors (1008553023).

3020891649 is a wasteful number, since it uses less digits than its factorization.

3020891649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397287.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 3020891649 is about 54962.6386648239. The cubic root of 3020891649 is about 1445.5897145614.

The spelling of 3020891649 in words is "three billion, twenty million, eight hundred ninety-one thousand, six hundred forty-nine".