11855898 has 24 divisors (see below), whose sum is σ = 25751700. Its totient is φ = 3942144.

The previous prime is 11855881. The next prime is 11855903. The reversal of 11855898 is 89855811.

11855898 is a `hidden beast` number, since 1 + 1 + 8 + 558 + 98 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8838729 + 3017169 = 2973^2 + 1737^2 .

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, 12298 + ... + 13226.

Almost surely, 2^11855898 is an apocalyptic number.

11855898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11855898 is an abundant number, since it is smaller than the sum of its proper divisors (13895802).

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

11855898 is a wasteful number, since it uses less digits than its factorization.

11855898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1643 counting only the distinct ones).

The product of its digits is 115200, while the sum is 45.

The square root of 11855898 is about 3443.2394630638. The cubic root of 11855898 is about 228.0227354983.

The spelling of 11855898 in words is "eleven million, eight hundred fifty-five thousand, eight hundred ninety-eight".