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206988 = 22347367
BaseRepresentation
bin110010100010001100
3101111221020
4302202030
523110423
64234140
71521315
oct624214
9344836
10206988
11131571
129b950
13732a2
145560c
15414e3
hex3288c

206988 has 24 divisors (see below), whose sum is σ = 494592. Its totient is φ = 67344.

The previous prime is 206953. The next prime is 206993. The reversal of 206988 is 889602.

It is an Ulam number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 381 + ... + 747.

It is an arithmetic number, because the mean of its divisors is an integer number (20608).

2206988 is an apocalyptic number.

It is an amenable number.

206988 is an abundant number, since it is smaller than the sum of its proper divisors (287604).

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

206988 is a wasteful number, since it uses less digits than its factorization.

206988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 206988 is about 454.9593388425. The cubic root of 206988 is about 59.1536738867.

It can be divided in two parts, 20698 and 8, that added together give a triangular number (20706 = T203).

The spelling of 206988 in words is "two hundred six thousand, nine hundred eighty-eight".