3845478667220 has 24 divisors (see below), whose sum is σ = 8092364313600. Its totient is φ = 1534980207392.

The previous prime is 3845478667213. The next prime is 3845478667223. The reversal of 3845478667220 is 227668745483.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3845478667223) 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, 200693900 + ... + 200713059.

It is an arithmetic number, because the mean of its divisors is an integer number (337181846400).

Almost surely, 2^{3845478667220} is an apocalyptic number.

It is an amenable number.

3845478667220 is an abundant number, since it is smaller than the sum of its proper divisors (4246885646380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3845478667220 is a wasteful number, since it uses less digits than its factorization.

3845478667220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401407447 (or 401407445 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 62.

The spelling of 3845478667220 in words is "three trillion, eight hundred forty-five billion, four hundred seventy-eight million, six hundred sixty-seven thousand, two hundred twenty".