161273388 has 12 divisors (see below), whose sum is σ = 376304600. Its totient is φ = 53757792.

The previous prime is 161273317. The next prime is 161273389. The reversal of 161273388 is 883372161.

161273388 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 (12).

It is not an unprimeable number, because it can be changed into a prime (161273389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6719713 + ... + 6719736.

Almost surely, 2^161273388 is an apocalyptic number.

It is an amenable number.

161273388 is an abundant number, since it is smaller than the sum of its proper divisors (215031212).

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

161273388 is a wasteful number, since it uses less digits than its factorization.

161273388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13439456 (or 13439454 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 161273388 is about 12699.3459674111. The cubic root of 161273388 is about 544.3199305739.

The spelling of 161273388 in words is "one hundred sixty-one million, two hundred seventy-three thousand, three hundred eighty-eight".