11972638 has 8 divisors (see below), whose sum is σ = 18063288. Its totient is φ = 5951544.

The previous prime is 11972633. The next prime is 11972651. The reversal of 11972638 is 83627911.

11972638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 11972597 and 11972606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11972633) 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, 16956 + ... + 17647.

It is an arithmetic number, because the mean of its divisors is an integer number (2257911).

Almost surely, 2^11972638 is an apocalyptic number.

11972638 is a deficient number, since it is larger than the sum of its proper divisors (6090650).

11972638 is a wasteful number, since it uses less digits than its factorization.

11972638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34778.

The product of its digits is 18144, while the sum is 37.

The square root of 11972638 is about 3460.1499967487. The cubic root of 11972638 is about 228.7687068022.

The spelling of 11972638 in words is "eleven million, nine hundred seventy-two thousand, six hundred thirty-eight".