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80570070 = 232571953127
BaseRepresentation
bin1001100110101…
…10011011010110
312121121101100200
410303112123112
5131111220240
611554521330
71665556110
oct463263326
9177541320
1080570070
1141530539
1222b96246
13138cc9c9
14a9b43b0
157117930
hex4cd66d6

80570070 has 192 divisors, whose sum is σ = 258785280. Its totient is φ = 16982784.

The previous prime is 80570059. The next prime is 80570071. The reversal of 80570070 is 7007508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80570071) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 634347 + ... + 634473.

It is an arithmetic number, because the mean of its divisors is an integer number (1347840).

Almost surely, 280570070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80570070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129392640).

80570070 is an abundant number, since it is smaller than the sum of its proper divisors (178215210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80570070 is a wasteful number, since it uses less digits than its factorization.

80570070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 80570070 is about 8976.0832215393. The cubic root of 80570070 is about 431.9079986695.

Adding to 80570070 its reverse (7007508), we get a palindrome (87577578).

The spelling of 80570070 in words is "eighty million, five hundred seventy thousand, seventy".