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89078231 = 118990989
BaseRepresentation
bin1010100111100…
…11100111010111
320012121122100202
411103303213113
5140301000411
612501131115
72131103204
oct523634727
9205548322
1089078231
1146311880
12259b9a9b
13155bb518
14bb8acab
157c4883b
hex54f39d7

89078231 has 8 divisors (see below), whose sum is σ = 98269200. Its totient is φ = 80069440.

The previous prime is 89078191. The next prime is 89078237. The reversal of 89078231 is 13287098.

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

It is not a de Polignac number, because 89078231 - 26 = 89078167 is a prime.

It is a super-2 number, since 2×890782312 = 15869862476178722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89078237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44516 + ... + 46473.

It is an arithmetic number, because the mean of its divisors is an integer number (12283650).

Almost surely, 289078231 is an apocalyptic number.

89078231 is a deficient number, since it is larger than the sum of its proper divisors (9190969).

89078231 is a wasteful number, since it uses less digits than its factorization.

89078231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91089.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 89078231 is about 9438.1264560293. The cubic root of 89078231 is about 446.6052882791.

The spelling of 89078231 in words is "eighty-nine million, seventy-eight thousand, two hundred thirty-one".

Divisors: 1 11 89 979 90989 1000879 8098021 89078231