11988858 has 32 divisors (see below), whose sum is σ = 27624960. Its totient is φ = 3397680.

The previous prime is 11988853. The next prime is 11988869. The reversal of 11988858 is 85888911.

It is a super-2 number, since 2×11988858² = 287465432288328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11988853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4413 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (863280).

Almost surely, 2^11988858 is an apocalyptic number.

11988858 is an abundant number, since it is smaller than the sum of its proper divisors (15636102).

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

11988858 is a wasteful number, since it uses less digits than its factorization.

11988858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322.

The product of its digits is 184320, while the sum is 48.

The square root of 11988858 is about 3462.4930324840. The cubic root of 11988858 is about 228.8719687572.

The spelling of 11988858 in words is "eleven million, nine hundred eighty-eight thousand, eight hundred fifty-eight".