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1378960168 = 231779128347
BaseRepresentation
bin101001000110001…
…0100001100101000
310120002202102201211
41102030110030220
510311003211133
6344455522504
746112653015
oct12214241450
93502672654
101378960168
11648429203
12325989434
1318c8c2c81
14d11d670c
15810dabcd
hex52314328

1378960168 has 32 divisors (see below), whose sum is σ = 2772316800. Its totient is φ = 640703232.

The previous prime is 1378960159. The next prime is 1378960223. The reversal of 1378960168 is 8610698731.

It is a super-2 number, since 2×13789601682 = 3803062289861176448, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53430 + ... + 74917.

It is an arithmetic number, because the mean of its divisors is an integer number (86634900).

Almost surely, 21378960168 is an apocalyptic number.

It is an amenable number.

1378960168 is an abundant number, since it is smaller than the sum of its proper divisors (1393356632).

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

1378960168 is a wasteful number, since it uses less digits than its factorization.

1378960168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128449 (or 128445 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1378960168 is about 37134.3529363311. The cubic root of 1378960168 is about 1113.0565777562.

The spelling of 1378960168 in words is "one billion, three hundred seventy-eight million, nine hundred sixty thousand, one hundred sixty-eight".

Divisors: 1 2 4 8 17 34 68 79 136 158 316 632 1343 2686 5372 10744 128347 256694 513388 1026776 2181899 4363798 8727596 10139413 17455192 20278826 40557652 81115304 172370021 344740042 689480084 1378960168