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68072800 = 255285091
BaseRepresentation
bin1000000111010…
…11010101100000
311202002110022211
410003223111200
5114411312200
610431011504
71454415655
oct403532540
9152073284
1068072800
1135475114
121a969b94
1311145583
14907dc2c
155e99aba
hex40eb560

68072800 has 36 divisors (see below), whose sum is σ = 166184676. Its totient is φ = 27228800.

The previous prime is 68072791. The next prime is 68072813. The reversal of 68072800 is 827086.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 41746 + ... + 43345.

It is an arithmetic number, because the mean of its divisors is an integer number (4616241).

Almost surely, 268072800 is an apocalyptic number.

It is an amenable number.

68072800 is an abundant number, since it is smaller than the sum of its proper divisors (98111876).

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

68072800 is a wasteful number, since it uses less digits than its factorization.

68072800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85111 (or 85098 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 68072800 is about 8250.6242188091. The cubic root of 68072800 is about 408.3111173068.

Adding to 68072800 its reverse (827086), we get a palindrome (68899886).

The spelling of 68072800 in words is "sixty-eight million, seventy-two thousand, eight hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 80 100 160 200 400 800 85091 170182 340364 425455 680728 850910 1361456 1701820 2127275 2722912 3403640 4254550 6807280 8509100 13614560 17018200 34036400 68072800