3909638136 has 32 divisors (see below), whose sum is σ = 9919981440. Its totient is φ = 1283761248.

The previous prime is 3909638101. The next prime is 3909638153. The reversal of 3909638136 is 6318369093.

It is a happy number.

3909638136 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (48) 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 7 ways as a sum of consecutive naturals, for example, 1214076 + ... + 1217291.

It is an arithmetic number, because the mean of its divisors is an integer number (309999420).

Almost surely, 2^3909638136 is an apocalyptic number.

It is an amenable number.

3909638136 is an abundant number, since it is smaller than the sum of its proper divisors (6010343304).

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

3909638136 is a wasteful number, since it uses less digits than its factorization.

3909638136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431443 (or 2431439 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 48.

The square root of 3909638136 is about 62527.0992130612. The cubic root of 3909638136 is about 1575.3565177303.

The spelling of 3909638136 in words is "three billion, nine hundred nine million, six hundred thirty-eight thousand, one hundred thirty-six".