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80553870 = 23251496007
BaseRepresentation
bin1001100110100…
…10011110001110
312121120120010200
410303102132032
5131110210440
611554314330
71665460635
oct463223616
9177516120
1080553870
114151a351
1222b889a6
13138c5517
14a9ac51c
157112c30
hex4cd278e

80553870 has 48 divisors (see below), whose sum is σ = 210880800. Its totient is φ = 21333312.

The previous prime is 80553853. The next prime is 80553883. The reversal of 80553870 is 7835508.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10407 + ... + 16413.

It is an arithmetic number, because the mean of its divisors is an integer number (4393350).

Almost surely, 280553870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80553870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105440400).

80553870 is an abundant number, since it is smaller than the sum of its proper divisors (130326930).

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

80553870 is a wasteful number, since it uses less digits than its factorization.

80553870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169 (or 6166 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 80553870 is about 8975.1807781236. The cubic root of 80553870 is about 431.8790492157.

The spelling of 80553870 in words is "eighty million, five hundred fifty-three thousand, eight hundred seventy".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 90 149 298 447 745 894 1341 1490 2235 2682 4470 6007 6705 12014 13410 18021 30035 36042 54063 60070 90105 108126 180210 270315 540630 895043 1790086 2685129 4475215 5370258 8055387 8950430 13425645 16110774 26851290 40276935 80553870