11897442 has 30 divisors (see below), whose sum is σ = 26757819. Its totient is φ = 3951180.

The previous prime is 11897423. The next prime is 11897449. The reversal of 11897442 is 24479811.

It can be written as a sum of positive squares in only one way, i.e., 5948721 + 5948721 = 2439^2 + 2439^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2439.

It is a super-2 number, since 2×11897442² = 283098252286728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11897397 and 11897406.

It is not an unprimeable number, because it can be changed into a prime (11897449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 43767 + ... + 44037.

Almost surely, 2^11897442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11897442

11897442 is an abundant number, since it is smaller than the sum of its proper divisors (14860377).

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

11897442 is an frugal number, since it uses more digits than its factorization.

11897442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 276 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 11897442 is about 3449.2668786280. The cubic root of 11897442 is about 228.2887615535.

The spelling of 11897442 in words is "eleven million, eight hundred ninety-seven thousand, four hundred forty-two".