161428320 has 72 divisors (see below), whose sum is σ = 550879056. Its totient is φ = 43047168.

The previous prime is 161428279. The next prime is 161428339. The reversal of 161428320 is 23824161.

161428320 is a `hidden beast` number, since 1 + 614 + 28 + 3 + 20 = 666.

161428320 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 (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54612 + ... + 57491.

It is an arithmetic number, because the mean of its divisors is an integer number (7651098).

Almost surely, 2^161428320 is an apocalyptic number.

161428320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161428320 is an abundant number, since it is smaller than the sum of its proper divisors (389450736).

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

161428320 is a wasteful number, since it uses less digits than its factorization.

161428320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112124 (or 112113 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 161428320 is about 12705.4445022597. Note that the first 3 decimals coincide. The cubic root of 161428320 is about 544.4941804102.

The spelling of 161428320 in words is "one hundred sixty-one million, four hundred twenty-eight thousand, three hundred twenty".