168406788 has 48 divisors (see below), whose sum is σ = 431988480. Its totient is φ = 50637600.

The previous prime is 168406783. The next prime is 168406793. The reversal of 168406788 is 887604861.

It is an interprime number because it is at equal distance from previous prime (168406783) and next prime (168406793).

It is not an unprimeable number, because it can be changed into a prime (168406783) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12423 + ... + 22161.

It is an arithmetic number, because the mean of its divisors is an integer number (8999760).

Almost surely, 2^168406788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168406788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215994240).

168406788 is an abundant number, since it is smaller than the sum of its proper divisors (263581692).

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

168406788 is a wasteful number, since it uses less digits than its factorization.

168406788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9888 (or 9886 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 168406788 is about 12977.1640969821. The cubic root of 168406788 is about 552.2298323544.

The spelling of 168406788 in words is "one hundred sixty-eight million, four hundred six thousand, seven hundred eighty-eight".