168608390 has 32 divisors (see below), whose sum is σ = 308962080. Its totient is φ = 66240000.

The previous prime is 168608389. The next prime is 168608399. The reversal of 168608390 is 93806861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168608399) 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, 139790 + ... + 140990.

It is an arithmetic number, because the mean of its divisors is an integer number (9655065).

Almost surely, 2^168608390 is an apocalyptic number.

168608390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168608390 is a deficient number, since it is larger than the sum of its proper divisors (140353690).

168608390 is a wasteful number, since it uses less digits than its factorization.

168608390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 168608390 is about 12984.9293413557. The cubic root of 168608390 is about 552.4501050334.

The spelling of 168608390 in words is "one hundred sixty-eight million, six hundred eight thousand, three hundred ninety".