161938432 has 22 divisors (see below), whose sum is σ = 323720768. Its totient is φ = 80968704.

The previous prime is 161938429. The next prime is 161938471. The reversal of 161938432 is 234839161.

It is a junction number, because it is equal to n+sod(n) for n = 161938391 and 161938400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78048 + ... + 80095.

Almost surely, 2^161938432 is an apocalyptic number.

It is an amenable number.

161938432 is a deficient number, since it is larger than the sum of its proper divisors (161782336).

161938432 is an equidigital number, since it uses as much as digits as its factorization.

161938432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158163 (or 158145 counting only the distinct ones).

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

The square root of 161938432 is about 12725.5032120541. The cubic root of 161938432 is about 545.0671095432.

The spelling of 161938432 in words is "one hundred sixty-one million, nine hundred thirty-eight thousand, four hundred thirty-two".