11990638 has 8 divisors (see below), whose sum is σ = 19621080. Its totient is φ = 5450280.

The previous prime is 11990633. The next prime is 11990639. The reversal of 11990638 is 83609911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 11990597 and 11990606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11990633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272493 + ... + 272536.

It is an arithmetic number, because the mean of its divisors is an integer number (2452635).

Almost surely, 2^11990638 is an apocalyptic number.

11990638 is a deficient number, since it is larger than the sum of its proper divisors (7630442).

11990638 is a wasteful number, since it uses less digits than its factorization.

11990638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545042.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 11990638 is about 3462.7500631723. The cubic root of 11990638 is about 228.8832951611.

The spelling of 11990638 in words is "eleven million, nine hundred ninety thousand, six hundred thirty-eight".