3020897781 has 32 divisors (see below), whose sum is σ = 5050627200. Its totient is φ = 1767709440.

The previous prime is 3020897777. The next prime is 3020897851. The reversal of 3020897781 is 1877980203.

It is not a de Polignac number, because 3020897781 - 2² = 3020897777 is a prime.

It is a super-2 number, since 2×3020897781² = 18251646806501447922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3020897701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166756 + ... + 183981.

It is an arithmetic number, because the mean of its divisors is an integer number (157832100).

Almost surely, 2^3020897781 is an apocalyptic number.

It is an amenable number.

3020897781 is a deficient number, since it is larger than the sum of its proper divisors (2029729419).

3020897781 is a wasteful number, since it uses less digits than its factorization.

3020897781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350786 (or 350780 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 3020897781 is about 54962.6944481436. The cubic root of 3020897781 is about 1445.5906926777.

The spelling of 3020897781 in words is "three billion, twenty million, eight hundred ninety-seven thousand, seven hundred eighty-one".