3688781916 has 24 divisors (see below), whose sum is σ = 8619778944. Its totient is φ = 1227790960.

The previous prime is 3688781903. The next prime is 3688781989. The reversal of 3688781916 is 6191878863.

It is a super-2 number, since 2×3688781916² = 27214224047617262112, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 216840 + ... + 233231.

It is an arithmetic number, because the mean of its divisors is an integer number (359157456).

Almost surely, 2^3688781916 is an apocalyptic number.

It is an amenable number.

3688781916 is an abundant number, since it is smaller than the sum of its proper divisors (4930997028).

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

3688781916 is a wasteful number, since it uses less digits than its factorization.

3688781916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450761 (or 450759 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 57.

The square root of 3688781916 is about 60735.3432195785. The cubic root of 3688781916 is about 1545.1156570764.

The spelling of 3688781916 in words is "three billion, six hundred eighty-eight million, seven hundred eighty-one thousand, nine hundred sixteen".