11288638 has 4 divisors (see below), whose sum is σ = 16932960. Its totient is φ = 5644318.

The previous prime is 11288633. The next prime is 11288677. The reversal of 11288638 is 83688211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83688211 = 8537 ⋅9803.

It is a junction number, because it is equal to n+sod(n) for n = 11288597 and 11288606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11288633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822158 + ... + 2822161.

It is an arithmetic number, because the mean of its divisors is an integer number (4233240).

Almost surely, 2^11288638 is an apocalyptic number.

11288638 is a deficient number, since it is larger than the sum of its proper divisors (5644322).

11288638 is an equidigital number, since it uses as much as digits as its factorization.

11288638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5644321.

The product of its digits is 18432, while the sum is 37.

The square root of 11288638 is about 3359.8568421884. The cubic root of 11288638 is about 224.3264664595.

The spelling of 11288638 in words is "eleven million, two hundred eighty-eight thousand, six hundred thirty-eight".