4638855620 has 192 divisors, whose sum is σ = 12198864384. Its totient is φ = 1445560320.

The previous prime is 4638855601. The next prime is 4638855647. The reversal of 4638855620 is 265588364.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13368287 + ... + 13368633.

It is an arithmetic number, because the mean of its divisors is an integer number (63535752).

Almost surely, 2^4638855620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4638855620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6099432192).

4638855620 is an abundant number, since it is smaller than the sum of its proper divisors (7560008764).

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

4638855620 is a wasteful number, since it uses less digits than its factorization.

4638855620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 47.

The square root of 4638855620 is about 68109.1449072736. The cubic root of 4638855620 is about 1667.7730508970.

The spelling of 4638855620 in words is "four billion, six hundred thirty-eight million, eight hundred fifty-five thousand, six hundred twenty".