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80239388 = 22171179991
BaseRepresentation
bin1001100100001…
…01101100011100
312120222120202012
410302011230130
5131020130023
611543450352
71663011035
oct462055434
9176876665
1080239388
1141325049
1222a569b8
1313815338
14a929a8c
15709e978
hex4c85b1c

80239388 has 12 divisors (see below), whose sum is σ = 148678992. Its totient is φ = 37759680.

The previous prime is 80239381. The next prime is 80239399. The reversal of 80239388 is 88393208.

It is a super-2 number, since 2×802393882 = 12876718773229088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80239381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589928 + ... + 590063.

It is an arithmetic number, because the mean of its divisors is an integer number (12389916).

Almost surely, 280239388 is an apocalyptic number.

It is an amenable number.

80239388 is a deficient number, since it is larger than the sum of its proper divisors (68439604).

80239388 is a wasteful number, since it uses less digits than its factorization.

80239388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180012 (or 1180010 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 80239388 is about 8957.6441099209. The cubic root of 80239388 is about 431.3162982017.

The spelling of 80239388 in words is "eighty million, two hundred thirty-nine thousand, three hundred eighty-eight".

Divisors: 1 2 4 17 34 68 1179991 2359982 4719964 20059847 40119694 80239388