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80895757 = 1933491201
BaseRepresentation
bin1001101001001…
…01111100001101
312122012221010011
410310211330031
5131202131012
612005513221
72001413455
oct464457415
9178187104
1080895757
11417331a8
1223112811
13139b5017
14aa5ad65
15717e1a7
hex4d25f0d

80895757 has 8 divisors (see below), whose sum is σ = 81615800. Its totient is φ = 80179200.

The previous prime is 80895751. The next prime is 80895779. The reversal of 80895757 is 75759808.

It can be written as a sum of positive squares in 4 ways, for example, as 3721 + 80892036 = 61^2 + 8994^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-80895757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80895757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80895751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66757 + ... + 67957.

It is an arithmetic number, because the mean of its divisors is an integer number (10201975).

Almost surely, 280895757 is an apocalyptic number.

It is an amenable number.

80895757 is a deficient number, since it is larger than the sum of its proper divisors (720043).

80895757 is a wasteful number, since it uses less digits than its factorization.

80895757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743.

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 80895757 is about 8994.2068577502. The cubic root of 80895757 is about 432.4891810140.

The spelling of 80895757 in words is "eighty million, eight hundred ninety-five thousand, seven hundred fifty-seven".

Divisors: 1 193 349 1201 67357 231793 419149 80895757