168857840 has 40 divisors (see below), whose sum is σ = 400956480. Its totient is φ = 66104576.

The previous prime is 168857813. The next prime is 168857851. The reversal of 168857840 is 48758861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

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, 18695 + ... + 26214.

It is an arithmetic number, because the mean of its divisors is an integer number (10023912).

Almost surely, 2^168857840 is an apocalyptic number.

168857840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168857840 is an abundant number, since it is smaller than the sum of its proper divisors (232098640).

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

168857840 is a wasteful number, since it uses less digits than its factorization.

168857840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44969 (or 44963 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 47.

The square root of 168857840 is about 12994.5311573754. The cubic root of 168857840 is about 552.7224140873.

The spelling of 168857840 in words is "one hundred sixty-eight million, eight hundred fifty-seven thousand, eight hundred forty".