171361728 has 42 divisors (see below), whose sum is σ = 491179104. Its totient is φ = 57120384.

The previous prime is 171361727. The next prime is 171361777. The reversal of 171361728 is 827163171.

171361728 is a `hidden beast` number, since 1 + 7 + 13 + 617 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 171361692 and 171361701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171361727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 148176 + ... + 149327.

Almost surely, 2^171361728 is an apocalyptic number.

171361728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

171361728 is an abundant number, since it is smaller than the sum of its proper divisors (319817376).

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

171361728 is a wasteful number, since it uses less digits than its factorization.

171361728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297521 (or 297508 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 171361728 is about 13090.5205396883. The cubic root of 171361728 is about 555.4410129960.

The spelling of 171361728 in words is "one hundred seventy-one million, three hundred sixty-one thousand, seven hundred twenty-eight".