11639938 has 4 divisors (see below), whose sum is σ = 17459910. Its totient is φ = 5819968.

The previous prime is 11639897. The next prime is 11639963. The reversal of 11639938 is 83993611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83993611 = 13 ⋅6461047.

It can be written as a sum of positive squares in only one way, i.e., 9102289 + 2537649 = 3017^2 + 1593^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11639938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2909983 + ... + 2909986.

Almost surely, 2^11639938 is an apocalyptic number.

11639938 is a deficient number, since it is larger than the sum of its proper divisors (5819972).

11639938 is an equidigital number, since it uses as much as digits as its factorization.

11639938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5819971.

The product of its digits is 34992, while the sum is 40.

The square root of 11639938 is about 3411.7353355734. The cubic root of 11639938 is about 226.6297339864.

The spelling of 11639938 in words is "eleven million, six hundred thirty-nine thousand, nine hundred thirty-eight".