168045040 has 20 divisors (see below), whose sum is σ = 390704904. Its totient is φ = 67217984.

The previous prime is 168045029. The next prime is 168045043. The reversal of 168045040 is 40540861.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168045043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050202 + ... + 1050361.

Almost surely, 2^168045040 is an apocalyptic number.

168045040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168045040 is an abundant number, since it is smaller than the sum of its proper divisors (222659864).

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

168045040 is a wasteful number, since it uses less digits than its factorization.

168045040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100576 (or 2100570 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 168045040 is about 12963.2187361010. The cubic root of 168045040 is about 551.8341411659.

The spelling of 168045040 in words is "one hundred sixty-eight million, forty-five thousand, forty".