161167840 has 24 divisors (see below), whose sum is σ = 380759400. Its totient is φ = 64467072.

The previous prime is 161167829. The next prime is 161167847. The reversal of 161167840 is 48761161.

161167840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161167796 and 161167805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161167847) 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, 503490 + ... + 503809.

It is an arithmetic number, because the mean of its divisors is an integer number (15864975).

Almost surely, 2^161167840 is an apocalyptic number.

161167840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161167840 is an abundant number, since it is smaller than the sum of its proper divisors (219591560).

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

161167840 is a wasteful number, since it uses less digits than its factorization.

161167840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007314 (or 1007306 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 161167840 is about 12695.1896401747. The cubic root of 161167840 is about 544.2011583062.

The spelling of 161167840 in words is "one hundred sixty-one million, one hundred sixty-seven thousand, eight hundred forty".