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172930 = 2517293
BaseRepresentation
bin101010001110000010
322210012211
4222032002
521013210
63412334
71320112
oct521602
9283184
10172930
11108a1a
12840aa
1360934
1447042
153638a
hex2a382

172930 has 8 divisors (see below), whose sum is σ = 311292. Its totient is φ = 69168.

The previous prime is 172883. The next prime is 172933. The reversal of 172930 is 39271.

It can be written as a sum of positive squares in 2 ways, for example, as 151321 + 21609 = 389^2 + 147^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (172933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8637 + ... + 8656.

2172930 is an apocalyptic number.

172930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172930 is a deficient number, since it is larger than the sum of its proper divisors (138362).

172930 is a wasteful number, since it uses less digits than its factorization.

172930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17300.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 172930 is about 415.8485301164. The cubic root of 172930 is about 55.7130302463.

The spelling of 172930 in words is "one hundred seventy-two thousand, nine hundred thirty".

Divisors: 1 2 5 10 17293 34586 86465 172930