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80389841 = 721640609
BaseRepresentation
bin1001100101010…
…10011011010001
312121021020010112
410302222123101
5131034433331
611551011105
71664205500
oct462523321
9177236115
1080389841
1141418094
1222b09a95
131386896c
14a968837
1570ce32b
hex4caa6d1

80389841 has 6 divisors (see below), whose sum is σ = 93514770. Its totient is φ = 68905536.

The previous prime is 80389823. The next prime is 80389877. The reversal of 80389841 is 14898308.

It can be written as a sum of positive squares in only one way, i.e., 80281600 + 108241 = 8960^2 + 329^2 .

It is not a de Polignac number, because 80389841 - 210 = 80388817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80383841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 820256 + ... + 820353.

It is an arithmetic number, because the mean of its divisors is an integer number (15585795).

Almost surely, 280389841 is an apocalyptic number.

It is an amenable number.

80389841 is a deficient number, since it is larger than the sum of its proper divisors (13124929).

80389841 is a wasteful number, since it uses less digits than its factorization.

80389841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640623 (or 1640616 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 80389841 is about 8966.0381997848. The cubic root of 80389841 is about 431.5857100026.

The spelling of 80389841 in words is "eighty million, three hundred eighty-nine thousand, eight hundred forty-one".

Divisors: 1 7 49 1640609 11484263 80389841