161893432 has 16 divisors (see below), whose sum is σ = 303845760. Its totient is φ = 80867904.

The previous prime is 161893411. The next prime is 161893447. The reversal of 161893432 is 234398161.

It is a junction number, because it is equal to n+sod(n) for n = 161893391 and 161893400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613 + ... + 18004.

It is an arithmetic number, because the mean of its divisors is an integer number (18990360).

Almost surely, 2^161893432 is an apocalyptic number.

It is an amenable number.

161893432 is a deficient number, since it is larger than the sum of its proper divisors (141952328).

161893432 is a wasteful number, since it uses less digits than its factorization.

161893432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19710 (or 19706 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 161893432 is about 12723.7349862373. The cubic root of 161893432 is about 545.0166165009.

The spelling of 161893432 in words is "one hundred sixty-one million, eight hundred ninety-three thousand, four hundred thirty-two".