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80281968 = 24313128657
BaseRepresentation
bin1001100100100…
…00000101110000
312121001202011020
410302100011300
5131023010333
611544415440
71663246134
oct462200560
9177052136
1080281968
1141354038
1222a77580
131382b830
14a93b3c4
1570ac3b3
hex4c90170

80281968 has 40 divisors (see below), whose sum is σ = 223350288. Its totient is φ = 24701952.

The previous prime is 80281963. The next prime is 80281991. The reversal of 80281968 is 86918208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80281961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63705 + ... + 64952.

Almost surely, 280281968 is an apocalyptic number.

It is an amenable number.

80281968 is an abundant number, since it is smaller than the sum of its proper divisors (143068320).

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

80281968 is a wasteful number, since it uses less digits than its factorization.

80281968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128681 (or 128675 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 80281968 is about 8960.0205356908. The cubic root of 80281968 is about 431.3925791105.

The spelling of 80281968 in words is "eighty million, two hundred eighty-one thousand, nine hundred sixty-eight".

Divisors: 1 2 3 4 6 8 12 13 16 24 26 39 48 52 78 104 156 208 312 624 128657 257314 385971 514628 771942 1029256 1543884 1672541 2058512 3087768 3345082 5017623 6175536 6690164 10035246 13380328 20070492 26760656 40140984 80281968