3865612608 has 336 divisors, whose sum is σ = 13220468352. Its totient is φ = 1064448000.

The previous prime is 3865612577. The next prime is 3865612613. The reversal of 3865612608 is 8062165683.

3865612608 is a `hidden beast` number, since 3 + 86 + 561 + 2 + 6 + 0 + 8 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 5847798 + ... + 5848458.

It is an arithmetic number, because the mean of its divisors is an integer number (39346632).

Almost surely, 2^3865612608 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 3865612608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6610234176).

3865612608 is an abundant number, since it is smaller than the sum of its proper divisors (9354855744).

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

3865612608 is a wasteful number, since it uses less digits than its factorization.

3865612608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 3865612608 is about 62174.0509215862. The cubic root of 3865612608 is about 1569.4209405229.

The spelling of 3865612608 in words is "three billion, eight hundred sixty-five million, six hundred twelve thousand, six hundred eight".