188891892 has 48 divisors (see below), whose sum is σ = 559681920. Its totient is φ = 53968896.

The previous prime is 188891887. The next prime is 188891957. The reversal of 188891892 is 298198881.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124173 + ... + 125684.

It is an arithmetic number, because the mean of its divisors is an integer number (11660040).

Almost surely, 2^188891892 is an apocalyptic number.

188891892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

188891892 is an abundant number, since it is smaller than the sum of its proper divisors (370790028).

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

188891892 is a wasteful number, since it uses less digits than its factorization.

188891892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249877 (or 249869 counting only the distinct ones).

The product of its digits is 663552, while the sum is 54.

The square root of 188891892 is about 13743.7946725058. The cubic root of 188891892 is about 573.7699142987.

The spelling of 188891892 in words is "one hundred eighty-eight million, eight hundred ninety-one thousand, eight hundred ninety-two".