3671911620 has 144 divisors (see below), whose sum is σ = 12287791152. Its totient is φ = 881786880.

The previous prime is 3671911543. The next prime is 3671911631. The reversal of 3671911620 is 261191763.

3671911620 is a `hidden beast` number, since 3 + 6 + 7 + 19 + 11 + 620 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 363131136 + 3308780484 = 19056^2 + 57522^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76804 + ... + 115076.

It is an arithmetic number, because the mean of its divisors is an integer number (85331883).

Almost surely, 2^3671911620 is an apocalyptic number.

3671911620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3671911620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6143895576).

3671911620 is an abundant number, since it is smaller than the sum of its proper divisors (8615879532).

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

3671911620 is a wasteful number, since it uses less digits than its factorization.

3671911620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38342 (or 38337 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 3671911620 is about 60596.3003821190. The cubic root of 3671911620 is about 1542.7565768519.

The spelling of 3671911620 in words is "three billion, six hundred seventy-one million, nine hundred eleven thousand, six hundred twenty".