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80363689 = 743313853
BaseRepresentation
bin1001100101001…
…00000010101001
312121012220020221
410302210002221
5131033114224
611550250041
71664036320
oct462440251
9177186227
1080363689
11413aa47a
1222ab6921
1313859aa3
14a95d0b7
1570c66e4
hex4ca40a9

80363689 has 16 divisors (see below), whose sum is σ = 94390912. Its totient is φ = 66987648.

The previous prime is 80363683. The next prime is 80363713. The reversal of 80363689 is 98636308.

It is not a de Polignac number, because 80363689 - 213 = 80355497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (80363683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93787 + ... + 94639.

It is an arithmetic number, because the mean of its divisors is an integer number (5899432).

Almost surely, 280363689 is an apocalyptic number.

It is an amenable number.

80363689 is a deficient number, since it is larger than the sum of its proper divisors (14027223).

80363689 is a wasteful number, since it uses less digits than its factorization.

80363689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 80363689 is about 8964.5796889759. The cubic root of 80363689 is about 431.5389045295.

The spelling of 80363689 in words is "eighty million, three hundred sixty-three thousand, six hundred eighty-nine".

Divisors: 1 7 43 301 313 853 2191 5971 13459 36679 94213 256753 266989 1868923 11480527 80363689