161507928 has 16 divisors (see below), whose sum is σ = 403769880. Its totient is φ = 53835968.

The previous prime is 161507917. The next prime is 161507959. The reversal of 161507928 is 829705161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3364725 + ... + 3364772.

Almost surely, 2^161507928 is an apocalyptic number.

It is an amenable number.

161507928 is an abundant number, since it is smaller than the sum of its proper divisors (242261952).

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

161507928 is a wasteful number, since it uses less digits than its factorization.

161507928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729506 (or 6729502 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 161507928 is about 12708.5769462989. The cubic root of 161507928 is about 544.5836710467.

The spelling of 161507928 in words is "one hundred sixty-one million, five hundred seven thousand, nine hundred twenty-eight".