11811402 has 24 divisors (see below), whose sum is σ = 25746084. Its totient is φ = 3913344.

The previous prime is 11811391. The next prime is 11811419. The reversal of 11811402 is 20411811.

It can be written as a sum of positive squares in 2 ways, for example, as 11758041 + 53361 = 3429^2 + 231^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1218 + ... + 5010.

Almost surely, 2^11811402 is an apocalyptic number.

11811402 is an abundant number, since it is smaller than the sum of its proper divisors (13934682).

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

11811402 is a wasteful number, since it uses less digits than its factorization.

11811402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974 (or 3971 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 11811402 is about 3436.7720320091. The cubic root of 11811402 is about 227.7371162177.

The spelling of 11811402 in words is "eleven million, eight hundred eleven thousand, four hundred two".