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80326405 = 520397879
BaseRepresentation
bin1001100100110…
…10111100000101
312121011000010001
410302122330011
5131030421110
611545401301
71663522525
oct462327405
9177130101
1080326405
1141384465
1222a99231
1313845b23
14a94d685
1570ba63a
hex4c9af05

80326405 has 8 divisors (see below), whose sum is σ = 96451200. Its totient is φ = 64221456.

The previous prime is 80326369. The next prime is 80326409. The reversal of 80326405 is 50462308.

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

It is a cyclic number.

It is not a de Polignac number, because 80326405 - 29 = 80325893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80326409) 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, 6256 + ... + 14134.

It is an arithmetic number, because the mean of its divisors is an integer number (12056400).

Almost surely, 280326405 is an apocalyptic number.

It is an amenable number.

80326405 is a deficient number, since it is larger than the sum of its proper divisors (16124795).

80326405 is a wasteful number, since it uses less digits than its factorization.

80326405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9923.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 80326405 is about 8962.4999302650. The cubic root of 80326405 is about 431.4721580276.

The spelling of 80326405 in words is "eighty million, three hundred twenty-six thousand, four hundred five".

Divisors: 1 5 2039 7879 10195 39395 16065281 80326405