11858388 has 12 divisors (see below), whose sum is σ = 27669600. Its totient is φ = 3952792.

The previous prime is 11858387. The next prime is 11858423. The reversal of 11858388 is 88385811.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11858381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494088 + ... + 494111.

It is an arithmetic number, because the mean of its divisors is an integer number (2305800).

Almost surely, 2^11858388 is an apocalyptic number.

It is an amenable number.

11858388 is an abundant number, since it is smaller than the sum of its proper divisors (15811212).

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

11858388 is a wasteful number, since it uses less digits than its factorization.

11858388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988206 (or 988204 counting only the distinct ones).

The product of its digits is 61440, while the sum is 42.

The square root of 11858388 is about 3443.6010221859. The cubic root of 11858388 is about 228.0386976483.

It can be divided in two parts, 11858 and 388, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 11858388 in words is "eleven million, eight hundred fifty-eight thousand, three hundred eighty-eight".