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172988 = 2259733
BaseRepresentation
bin101010001110111100
322210021222
4222032330
521013423
63412512
71320224
oct521674
9283258
10172988
11108a72
1284138
136097a
1447084
15363c8
hex2a3bc

172988 has 12 divisors (see below), whose sum is σ = 308280. Its totient is φ = 84912.

The previous prime is 172987. The next prime is 172993. The reversal of 172988 is 889271.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172981) 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, 131 + ... + 602.

It is an arithmetic number, because the mean of its divisors is an integer number (25690).

2172988 is an apocalyptic number.

It is an amenable number.

172988 is a deficient number, since it is larger than the sum of its proper divisors (135292).

172988 is a wasteful number, since it uses less digits than its factorization.

172988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 794 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 172988 is about 415.9182612004. The cubic root of 172988 is about 55.7192581893.

It can be divided in two parts, 17298 and 8, that multiplied together give a square (138384 = 3722).

The spelling of 172988 in words is "one hundred seventy-two thousand, nine hundred eighty-eight".

Divisors: 1 2 4 59 118 236 733 1466 2932 43247 86494 172988