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70023760 = 245875297
BaseRepresentation
bin1000010110001…
…11101001010000
311212202120112121
410023013221100
5120411230020
610540504024
71510122622
oct413075120
9155676477
1070023760
1136587984
121b54b014
13116795a1
14942ac12
156232baa
hex42c7a50

70023760 has 20 divisors (see below), whose sum is σ = 162805428. Its totient is φ = 28009472.

The previous prime is 70023713. The next prime is 70023763. The reversal of 70023760 is 6732007.

It can be written as a sum of positive squares in 2 ways, for example, as 39287824 + 30735936 = 6268^2 + 5544^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70023763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437569 + ... + 437728.

Almost surely, 270023760 is an apocalyptic number.

It is an amenable number.

70023760 is an abundant number, since it is smaller than the sum of its proper divisors (92781668).

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

70023760 is a wasteful number, since it uses less digits than its factorization.

70023760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875310 (or 875304 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 70023760 is about 8368.0200764578. The cubic root of 70023760 is about 412.1751541055.

Adding to 70023760 its reverse (6732007), we get a palindrome (76755767).

The spelling of 70023760 in words is "seventy million, twenty-three thousand, seven hundred sixty".

Divisors: 1 2 4 5 8 10 16 20 40 80 875297 1750594 3501188 4376485 7002376 8752970 14004752 17505940 35011880 70023760