168870040 has 16 divisors (see below), whose sum is σ = 379957680. Its totient is φ = 67548000.

The previous prime is 168870029. The next prime is 168870047. The reversal of 168870040 is 40078861.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 168869978 and 168870005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168870047) 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, 2110836 + ... + 2110915.

It is an arithmetic number, because the mean of its divisors is an integer number (23747355).

Almost surely, 2^168870040 is an apocalyptic number.

168870040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168870040 is an abundant number, since it is smaller than the sum of its proper divisors (211087640).

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

168870040 is a wasteful number, since it uses less digits than its factorization.

168870040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221762 (or 4221758 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 168870040 is about 12995.0005771450. Note that the first 3 decimals coincide. The cubic root of 168870040 is about 552.7357251879.

The spelling of 168870040 in words is "one hundred sixty-eight million, eight hundred seventy thousand, forty".