161984040 has 32 divisors (see below), whose sum is σ = 485952480. Its totient is φ = 43195712.

The previous prime is 161984029. The next prime is 161984047. The reversal of 161984040 is 40489161.

161984040 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 = 161983992 and 161984010.

It is not an unprimeable number, because it can be changed into a prime (161984047) 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, 674814 + ... + 675053.

It is an arithmetic number, because the mean of its divisors is an integer number (15186015).

Almost surely, 2^161984040 is an apocalyptic number.

161984040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161984040 is an abundant number, since it is smaller than the sum of its proper divisors (323968440).

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

161984040 is a wasteful number, since it uses less digits than its factorization.

161984040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349881 (or 1349877 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 161984040 is about 12727.2950779025. The cubic root of 161984040 is about 545.1182752588.

The spelling of 161984040 in words is "one hundred sixty-one million, nine hundred eighty-four thousand, forty".