168911540 has 48 divisors (see below), whose sum is σ = 423021312. Its totient is φ = 55393536.

The previous prime is 168911503. The next prime is 168911579. The reversal of 168911540 is 45119861.

It is a super-2 number, since 2×168911540² = 57062216690343200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 168911540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23009 + ... + 29448.

It is an arithmetic number, because the mean of its divisors is an integer number (8812944).

Almost surely, 2^168911540 is an apocalyptic number.

168911540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168911540 is an abundant number, since it is smaller than the sum of its proper divisors (254109772).

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

168911540 is a wasteful number, since it uses less digits than its factorization.

168911540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52496 (or 52494 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 168911540 is about 12996.5972469720. The cubic root of 168911540 is about 552.7809999522.

The spelling of 168911540 in words is "one hundred sixty-eight million, nine hundred eleven thousand, five hundred forty".