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68802080 = 255430013
BaseRepresentation
bin1000001100111…
…01011000100000
311210110111201012
410012131120200
5120103131310
610454400052
71463544104
oct406353040
9153414635
1068802080
1135923026
121b060028
131133c4b9
1491cd904
156090c05
hex419d620

68802080 has 24 divisors (see below), whose sum is σ = 162545292. Its totient is φ = 27520768.

The previous prime is 68802079. The next prime is 68802089. The reversal of 68802080 is 8020886.

It can be written as a sum of positive squares in 2 ways, for example, as 62789776 + 6012304 = 7924^2 + 2452^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (68802089) 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, 214847 + ... + 215166.

Almost surely, 268802080 is an apocalyptic number.

It is an amenable number.

68802080 is an abundant number, since it is smaller than the sum of its proper divisors (93743212).

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

68802080 is a wasteful number, since it uses less digits than its factorization.

68802080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430028 (or 430020 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 68802080 is about 8294.7019235172. The cubic root of 68802080 is about 409.7640522256.

The spelling of 68802080 in words is "sixty-eight million, eight hundred two thousand, eighty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 430013 860026 1720052 2150065 3440104 4300130 6880208 8600260 13760416 17200520 34401040 68802080