11839640 has 32 divisors (see below), whose sum is σ = 26747280. Its totient is φ = 4716672.

The previous prime is 11839631. The next prime is 11839643. The reversal of 11839640 is 4693811.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11839597 and 11839606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11839643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13454 + ... + 14306.

Almost surely, 2^11839640 is an apocalyptic number.

11839640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11839640 is an abundant number, since it is smaller than the sum of its proper divisors (14907640).

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

11839640 is a wasteful number, since it uses less digits than its factorization.

11839640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 11839640 is about 3440.8777949820. The cubic root of 11839640 is about 227.9184585810.

The spelling of 11839640 in words is "eleven million, eight hundred thirty-nine thousand, six hundred forty".