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68028525 = 3352971039
BaseRepresentation
bin1000000111000…
…00100001101101
311202000012121000
410003200201231
5114403403100
610430030513
71454142615
oct403404155
9152005530
1068028525
1135444924
121a948439
131112b386
14906ba45
155e8b900
hex40e086d

68028525 has 48 divisors (see below), whose sum is σ = 126380800. Its totient is φ = 35873280.

The previous prime is 68028523. The next prime is 68028529. The reversal of 68028525 is 52582086.

It is not a de Polignac number, because 68028525 - 21 = 68028523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68028525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68028523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64956 + ... + 65994.

Almost surely, 268028525 is an apocalyptic number.

It is an amenable number.

68028525 is a deficient number, since it is larger than the sum of its proper divisors (58352275).

68028525 is a wasteful number, since it uses less digits than its factorization.

68028525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 68028525 is about 8247.9406520658. The cubic root of 68028525 is about 408.2225753562. Note that the first 3 decimals are identical.

The spelling of 68028525 in words is "sixty-eight million, twenty-eight thousand, five hundred twenty-five".

Divisors: 1 3 5 9 15 25 27 45 75 97 135 225 291 485 675 873 1039 1455 2425 2619 3117 4365 5195 7275 9351 13095 15585 21825 25975 28053 46755 65475 77925 100783 140265 233775 302349 503915 701325 907047 1511745 2519575 2721141 4535235 7558725 13605705 22676175 68028525