168697740 has 24 divisors (see below), whose sum is σ = 472353840. Its totient is φ = 44986048.

The previous prime is 168697723. The next prime is 168697741. The reversal of 168697740 is 47796861.

168697740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×168697740² = 56917854962215200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168697740.

It is not an unprimeable number, because it can be changed into a prime (168697741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1405755 + ... + 1405874.

It is an arithmetic number, because the mean of its divisors is an integer number (19681410).

Almost surely, 2^168697740 is an apocalyptic number.

168697740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168697740 is an abundant number, since it is smaller than the sum of its proper divisors (303656100).

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

168697740 is a wasteful number, since it uses less digits than its factorization.

168697740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811641 (or 2811639 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 168697740 is about 12988.3694126707. The cubic root of 168697740 is about 552.5476737252.

The spelling of 168697740 in words is "one hundred sixty-eight million, six hundred ninety-seven thousand, seven hundred forty".