168749892 has 72 divisors (see below), whose sum is σ = 445900000. Its totient is φ = 55800576.

The previous prime is 168749863. The next prime is 168749929. The reversal of 168749892 is 298947861.

168749892 is a `hidden beast` number, since 1 + 68 + 7 + 498 + 92 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134484 + ... + 135732.

Almost surely, 2^168749892 is an apocalyptic number.

168749892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168749892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222950000).

168749892 is an abundant number, since it is smaller than the sum of its proper divisors (277150108).

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

168749892 is a wasteful number, since it uses less digits than its factorization.

168749892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407 (or 1393 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 168749892 is about 12990.3768998440. The cubic root of 168749892 is about 552.6046069070.

The spelling of 168749892 in words is "one hundred sixty-eight million, seven hundred forty-nine thousand, eight hundred ninety-two".