Search a number
-
+
68199160 = 2351704979
BaseRepresentation
bin1000001000010…
…10001011111000
311202022212122211
410010022023320
5114424333120
610433424504
71455453241
oct404121370
9152285584
1068199160
1135551047
121aa0b134
131118ac43
1490b3cc8
155ec225a
hex410a2f8

68199160 has 16 divisors (see below), whose sum is σ = 153448200. Its totient is φ = 27279648.

The previous prime is 68199149. The next prime is 68199167. The reversal of 68199160 is 6199186.

It is a super-2 number, since 2×681991602 = 9302250849411200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1704979 = 68199160 / (6 + 8 + 1 + 9 + 9 + 1 + 6 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68199167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852450 + ... + 852529.

Almost surely, 268199160 is an apocalyptic number.

It is an amenable number.

68199160 is an abundant number, since it is smaller than the sum of its proper divisors (85249040).

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

68199160 is a wasteful number, since it uses less digits than its factorization.

68199160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704990 (or 1704986 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 68199160 is about 8258.2782709231. The cubic root of 68199160 is about 408.5636033795.

The spelling of 68199160 in words is "sixty-eight million, one hundred ninety-nine thousand, one hundred sixty".

Divisors: 1 2 4 5 8 10 20 40 1704979 3409958 6819916 8524895 13639832 17049790 34099580 68199160