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208774484 = 22173070213
BaseRepresentation
bin11000111000110…
…10010101010100
3112112211211202022
430130122111110
5411421240414
632414432312
75113360652
oct1434322524
9475754668
10208774484
11a79363a6
1259b02698
133433a0c9
141da27dd2
15134de18e
hexc71a554

208774484 has 12 divisors (see below), whose sum is σ = 386846964. Its totient is φ = 98246784.

The previous prime is 208774483. The next prime is 208774487. The reversal of 208774484 is 484477802.

It can be written as a sum of positive squares in 2 ways, for example, as 143520400 + 65254084 = 11980^2 + 8078^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208774481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535039 + ... + 1535174.

It is an arithmetic number, because the mean of its divisors is an integer number (32237247).

Almost surely, 2208774484 is an apocalyptic number.

It is an amenable number.

208774484 is a deficient number, since it is larger than the sum of its proper divisors (178072480).

208774484 is a wasteful number, since it uses less digits than its factorization.

208774484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070234 (or 3070232 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 44.

The square root of 208774484 is about 14449.0305557155. The cubic root of 208774484 is about 593.2336893084.

The spelling of 208774484 in words is "two hundred eight million, seven hundred seventy-four thousand, four hundred eighty-four".

Divisors: 1 2 4 17 34 68 3070213 6140426 12280852 52193621 104387242 208774484