161843860 has 24 divisors (see below), whose sum is σ = 344947680. Its totient is φ = 63770784.

The previous prime is 161843837. The next prime is 161843863. The reversal of 161843860 is 68348161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161843863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59050 + ... + 61729.

It is an arithmetic number, because the mean of its divisors is an integer number (14372820).

Almost surely, 2^161843860 is an apocalyptic number.

161843860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161843860 is an abundant number, since it is smaller than the sum of its proper divisors (183103820).

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

161843860 is a wasteful number, since it uses less digits than its factorization.

161843860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120855 (or 120853 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 161843860 is about 12721.7868241847. The cubic root of 161843860 is about 544.9609825335.

The spelling of 161843860 in words is "one hundred sixty-one million, eight hundred forty-three thousand, eight hundred sixty".