11855998 has 32 divisors (see below), whose sum is σ = 22353408. Its totient is φ = 4581600.

The previous prime is 11855993. The next prime is 11855999. The reversal of 11855998 is 89955811.

Its product of digits (129600) is a multiple of the sum of its prime divisors (648).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11855993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25488 + ... + 25948.

It is an arithmetic number, because the mean of its divisors is an integer number (698544).

Almost surely, 2^11855998 is an apocalyptic number.

11855998 is a deficient number, since it is larger than the sum of its proper divisors (10497410).

11855998 is a wasteful number, since it uses less digits than its factorization.

11855998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its digits is 129600, while the sum is 46.

The square root of 11855998 is about 3443.2539842422. The cubic root of 11855998 is about 228.0233765915.

The spelling of 11855998 in words is "eleven million, eight hundred fifty-five thousand, nine hundred ninety-eight".