168129740 has 24 divisors (see below), whose sum is σ = 364463232. Its totient is φ = 65082240.

The previous prime is 168129737. The next prime is 168129757. The reversal of 168129740 is 47921861.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 168129694 and 168129703.

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, 134969 + ... + 136208.

It is an arithmetic number, because the mean of its divisors is an integer number (15185968).

Almost surely, 2^168129740 is an apocalyptic number.

168129740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168129740 is an abundant number, since it is smaller than the sum of its proper divisors (196333492).

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

168129740 is a wasteful number, since it uses less digits than its factorization.

168129740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271217 (or 271215 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 168129740 is about 12966.4852600849. The cubic root of 168129740 is about 551.9268395303.

The spelling of 168129740 in words is "one hundred sixty-eight million, one hundred twenty-nine thousand, seven hundred forty".