168398720 has 64 divisors (see below), whose sum is σ = 460101600. Its totient is φ = 57735168.

The previous prime is 168398701. The next prime is 168398731. The reversal of 168398720 is 27893861.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14315 + ... + 23274.

Almost surely, 2^168398720 is an apocalyptic number.

168398720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168398720 is an abundant number, since it is smaller than the sum of its proper divisors (291702880).

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

168398720 is an equidigital number, since it uses as much as digits as its factorization.

168398720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37615 (or 37603 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 168398720 is about 12976.8532395184. The cubic root of 168398720 is about 552.2210135067.

The spelling of 168398720 in words is "one hundred sixty-eight million, three hundred ninety-eight thousand, seven hundred twenty".