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80428285 = 572297951
BaseRepresentation
bin1001100101100…
…11110011111101
312121100011212101
410302303303331
5131042201120
611551505101
71664425540
oct462636375
9177304771
1080428285
1141443a63
1222b28191
1313880302
14a978857
1570da90a
hex4cb3cfd

80428285 has 8 divisors (see below), whose sum is σ = 110301696. Its totient is φ = 55150800.

The previous prime is 80428279. The next prime is 80428297. The reversal of 80428285 is 58282408.

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

It is not a de Polignac number, because 80428285 - 25 = 80428253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1148941 + ... + 1149010.

It is an arithmetic number, because the mean of its divisors is an integer number (13787712).

Almost surely, 280428285 is an apocalyptic number.

It is an amenable number.

80428285 is a deficient number, since it is larger than the sum of its proper divisors (29873411).

80428285 is a wasteful number, since it uses less digits than its factorization.

80428285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297963.

The product of its (nonzero) digits is 40960, while the sum is 37.

The square root of 80428285 is about 8968.1818112703. The cubic root of 80428285 is about 431.6544966249.

The spelling of 80428285 in words is "eighty million, four hundred twenty-eight thousand, two hundred eighty-five".

Divisors: 1 5 7 35 2297951 11489755 16085657 80428285