161276728 has 8 divisors (see below), whose sum is σ = 302393880. Its totient is φ = 80638360.

The previous prime is 161276711. The next prime is 161276737. The reversal of 161276728 is 827672161.

161276728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

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, 10079788 + ... + 10079803.

It is an arithmetic number, because the mean of its divisors is an integer number (37799235).

Almost surely, 2^161276728 is an apocalyptic number.

It is an amenable number.

161276728 is a deficient number, since it is larger than the sum of its proper divisors (141117152).

161276728 is a wasteful number, since it uses less digits than its factorization.

161276728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20159597 (or 20159593 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 161276728 is about 12699.4774695654. The cubic root of 161276728 is about 544.3236882015.

The spelling of 161276728 in words is "one hundred sixty-one million, two hundred seventy-six thousand, seven hundred twenty-eight".