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67704680 = 23515710781
BaseRepresentation
bin1000000100100…
…01011101101000
311201101202100202
410002101131220
5114313022210
610415051332
71451323511
oct402213550
9151352322
1067704680
113524358a
121a810b48
1311046b54
148dc5a08
155e259a5
hex4091768

67704680 has 32 divisors (see below), whose sum is σ = 153320040. Its totient is φ = 26906880.

The previous prime is 67704673. The next prime is 67704701. The reversal of 67704680 is 8640776.

It can be written as a sum of positive squares in 4 ways, for example, as 40934404 + 26770276 = 6398^2 + 5174^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890 + ... + 11670.

Almost surely, 267704680 is an apocalyptic number.

It is an amenable number.

67704680 is an abundant number, since it is smaller than the sum of its proper divisors (85615360).

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

67704680 is a wasteful number, since it uses less digits than its factorization.

67704680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10949 (or 10945 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 67704680 is about 8228.2853620909. The cubic root of 67704680 is about 407.5737731365.

The spelling of 67704680 in words is "sixty-seven million, seven hundred four thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 157 314 628 785 1256 1570 3140 6280 10781 21562 43124 53905 86248 107810 215620 431240 1692617 3385234 6770468 8463085 13540936 16926170 33852340 67704680