3881685240 has 80 divisors (see below), whose sum is σ = 13046786280. Its totient is φ = 1035115200.

The previous prime is 3881685221. The next prime is 3881685307. The reversal of 3881685240 is 425861883.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 595786 + ... + 602265.

Almost surely, 2^3881685240 is an apocalyptic number.

3881685240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3881685240 is an abundant number, since it is smaller than the sum of its proper divisors (9165101040).

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

3881685240 is a wasteful number, since it uses less digits than its factorization.

3881685240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198074 (or 1198061 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 3881685240 is about 62303.1719898754. The cubic root of 3881685240 is about 1571.5930710595.

The spelling of 3881685240 in words is "three billion, eight hundred eighty-one million, six hundred eighty-five thousand, two hundred forty".