161934880 has 24 divisors (see below), whose sum is σ = 382571532. Its totient is φ = 64773888.

The previous prime is 161934859. The next prime is 161934887. The reversal of 161934880 is 88439161.

It can be written as a sum of positive squares in 2 ways, for example, as 152473104 + 9461776 = 12348^2 + 3076^2 .

It is a super-2 number, since 2×161934880² = 52445810721228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (161934887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505887 + ... + 506206.

Almost surely, 2^161934880 is an apocalyptic number.

161934880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161934880 is an abundant number, since it is smaller than the sum of its proper divisors (220636652).

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

161934880 is a wasteful number, since it uses less digits than its factorization.

161934880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012108 (or 1012100 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 161934880 is about 12725.3636490279. The cubic root of 161934880 is about 545.0631242991.

The spelling of 161934880 in words is "one hundred sixty-one million, nine hundred thirty-four thousand, eight hundred eighty".