3865669632 has 156 divisors (see below), whose sum is σ = 12182507064. Its totient is φ = 1171292160.

The previous prime is 3865669531. The next prime is 3865669663. The reversal of 3865669632 is 2369665683.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 400738 + ... + 410270.

It is an arithmetic number, because the mean of its divisors is an integer number (78092994).

Almost surely, 2^3865669632 is an apocalyptic number.

3865669632 is a gapful number since it is divisible by the number (32) 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 3865669632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6091253532).

3865669632 is an abundant number, since it is smaller than the sum of its proper divisors (8316837432).

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

3865669632 is a wasteful number, since it uses less digits than its factorization.

3865669632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9574 (or 9549 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 54.

The square root of 3865669632 is about 62174.5095034935. The cubic root of 3865669632 is about 1569.4286576455.

The spelling of 3865669632 in words is "three billion, eight hundred sixty-five million, six hundred sixty-nine thousand, six hundred thirty-two".