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68481998 = 2132633923
BaseRepresentation
bin1000001010011…
…11001111001110
311202212020122022
410011033033032
5120012410443
610443450142
71461041654
oct405171716
9152766568
1068481998
11357245a2
121ab26952
13112598c0
149148dd4
15602ae68
hex414f3ce

68481998 has 8 divisors (see below), whose sum is σ = 110624808. Its totient is φ = 31607064.

The previous prime is 68481983. The next prime is 68482003. The reversal of 68481998 is 89918486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×684819983 (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316936 + ... + 1316987.

It is an arithmetic number, because the mean of its divisors is an integer number (13828101).

Almost surely, 268481998 is an apocalyptic number.

68481998 is a deficient number, since it is larger than the sum of its proper divisors (42142810).

68481998 is a wasteful number, since it uses less digits than its factorization.

68481998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633938.

The product of its digits is 995328, while the sum is 53.

The square root of 68481998 is about 8275.3850665694. The cubic root of 68481998 is about 409.1276275878.

The spelling of 68481998 in words is "sixty-eight million, four hundred eighty-one thousand, nine hundred ninety-eight".

Divisors: 1 2 13 26 2633923 5267846 34240999 68481998