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80297618 = 21372271291
BaseRepresentation
bin1001100100100…
…11111010010010
312121002112121212
410302103322102
5131024010433
611545020122
71663342562
oct462237222
9177075555
1080297618
1141364875
1222a84642
13138359ab
14a942da2
1570b1d48
hex4c93e92

80297618 has 16 divisors (see below), whose sum is σ = 121954464. Its totient is φ = 39649440.

The previous prime is 80297611. The next prime is 80297683. The reversal of 80297618 is 81679208.

It is not an unprimeable number, because it can be changed into a prime (80297611) 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 7 ways as a sum of consecutive naturals, for example, 61553 + ... + 62843.

It is an arithmetic number, because the mean of its divisors is an integer number (7622154).

Almost surely, 280297618 is an apocalyptic number.

80297618 is a deficient number, since it is larger than the sum of its proper divisors (41656846).

80297618 is a wasteful number, since it uses less digits than its factorization.

80297618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 80297618 is about 8960.8938170252. The cubic root of 80297618 is about 431.4206088802.

The spelling of 80297618 in words is "eighty million, two hundred ninety-seven thousand, six hundred eighteen".

Divisors: 1 2 137 227 274 454 1291 2582 31099 62198 176867 293057 353734 586114 40148809 80297618