161128928 has 24 divisors (see below), whose sum is σ = 317505888. Its totient is φ = 80492544.

The previous prime is 161128879. The next prime is 161128951. The reversal of 161128928 is 829821161.

It is a junction number, because it is equal to n+sod(n) for n = 161128891 and 161128900.

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, 66425 + ... + 68807.

It is an arithmetic number, because the mean of its divisors is an integer number (13229412).

Almost surely, 2^161128928 is an apocalyptic number.

It is an amenable number.

161128928 is a deficient number, since it is larger than the sum of its proper divisors (156376960).

161128928 is a wasteful number, since it uses less digits than its factorization.

161128928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506 (or 4498 counting only the distinct ones).

The product of its digits is 13824, while the sum is 38.

The square root of 161128928 is about 12693.6569986746. The cubic root of 161128928 is about 544.1573578807.

The spelling of 161128928 in words is "one hundred sixty-one million, one hundred twenty-eight thousand, nine hundred twenty-eight".