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80138408 = 2371784179
BaseRepresentation
bin1001100011011…
…01000010101000
312120210110020012
410301231002220
5131003412113
611541351052
71662110450
oct461550250
9176713205
1080138408
1141266199
1222a08488
13137ab39c
14a900d60
15707eaa8
hex4c6d0a8

80138408 has 32 divisors (see below), whose sum is σ = 181828800. Its totient is φ = 32324352.

The previous prime is 80138407. The next prime is 80138423. The reversal of 80138408 is 80483108.

It is not an unprimeable number, because it can be changed into a prime (80138407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41138 + ... + 43041.

It is an arithmetic number, because the mean of its divisors is an integer number (5682150).

Almost surely, 280138408 is an apocalyptic number.

It is an amenable number.

80138408 is an abundant number, since it is smaller than the sum of its proper divisors (101690392).

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

80138408 is a wasteful number, since it uses less digits than its factorization.

80138408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84209 (or 84205 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 80138408 is about 8952.0058087559. The cubic root of 80138408 is about 431.1352873355.

The spelling of 80138408 in words is "eighty million, one hundred thirty-eight thousand, four hundred eight".

Divisors: 1 2 4 7 8 14 17 28 34 56 68 119 136 238 476 952 84179 168358 336716 589253 673432 1178506 1431043 2357012 2862086 4714024 5724172 10017301 11448344 20034602 40069204 80138408