168788340 has 144 divisors (see below), whose sum is σ = 610948800. Its totient is φ = 38574144.

The previous prime is 168788311. The next prime is 168788341. The reversal of 168788340 is 43887861.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168788341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23271 + ... + 29649.

It is an arithmetic number, because the mean of its divisors is an integer number (4242700).

Almost surely, 2^168788340 is an apocalyptic number.

168788340 is a gapful number since it is divisible by the number (10) 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 168788340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305474400).

168788340 is an abundant number, since it is smaller than the sum of its proper divisors (442160460).

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

168788340 is a wasteful number, since it uses less digits than its factorization.

168788340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411 (or 6396 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 168788340 is about 12991.8566802440. The cubic root of 168788340 is about 552.6465722248.

The spelling of 168788340 in words is "one hundred sixty-eight million, seven hundred eighty-eight thousand, three hundred forty".