188749818 has 32 divisors (see below), whose sum is σ = 420249600. Its totient is φ = 62795808.

The previous prime is 188749817. The next prime is 188749831. The reversal of 188749818 is 818947881.

It is a happy number.

188749818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (188749817) 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, 27655 + ... + 33797.

It is an arithmetic number, because the mean of its divisors is an integer number (13132800).

Almost surely, 2^188749818 is an apocalyptic number.

188749818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

188749818 is an abundant number, since it is smaller than the sum of its proper divisors (231499782).

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

188749818 is a wasteful number, since it uses less digits than its factorization.

188749818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6723 (or 6717 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 54.

The square root of 188749818 is about 13738.6250403743. The cubic root of 188749818 is about 573.6260255869.

The spelling of 188749818 in words is "one hundred eighty-eight million, seven hundred forty-nine thousand, eight hundred eighteen".