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268402686 = 23239720051
BaseRepresentation
bin11111111111101…
…11111111111110
3200201001021021020
433333313333332
51022202341221
642344445010
76436246056
oct1777677776
9621037236
10268402686
11128562a02
1275a79766
13437b6a76
142790a566
151886bac6
hexfff7ffe

268402686 has 32 divisors (see below), whose sum is σ = 565947648. Its totient is φ = 84691200.

The previous prime is 268402679. The next prime is 268402697. The reversal of 268402686 is 686204862.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3361 + ... + 23411.

It is an arithmetic number, because the mean of its divisors is an integer number (17685864).

Almost surely, 2268402686 is an apocalyptic number.

268402686 is an abundant number, since it is smaller than the sum of its proper divisors (297544962).

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

268402686 is a wasteful number, since it uses less digits than its factorization.

268402686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20176.

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 268402686 is about 16382.9999084417. Note that the first 4 decimals coincide. The cubic root of 268402686 is about 645.0533265206.

The spelling of 268402686 in words is "two hundred sixty-eight million, four hundred two thousand, six hundred eighty-six".

Divisors: 1 2 3 6 23 46 69 97 138 194 291 582 2231 4462 6693 13386 20051 40102 60153 120306 461173 922346 1383519 1944947 2767038 3889894 5834841 11669682 44733781 89467562 134201343 268402686