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7090431380 = 225615811829
BaseRepresentation
bin1101001101001111…
…10110010110010100
3200022010220020022122
412212213312112110
5104010122301010
63131324315112
7340464446414
oct64647662624
920263806278
107090431380
11300940004a
12145a6a2a98
1388cc79336
144b397a644
152b772d855
hex1a69f6594

7090431380 has 24 divisors (see below), whose sum is σ = 15134005320. Its totient is φ = 2789677440.

The previous prime is 7090431371. The next prime is 7090431431. The reversal of 7090431380 is 831340907.

It can be written as a sum of positive squares in 4 ways, for example, as 154206724 + 6936224656 = 12418^2 + 83284^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7090431380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2904695 + ... + 2907134.

It is an arithmetic number, because the mean of its divisors is an integer number (630583555).

Almost surely, 27090431380 is an apocalyptic number.

It is an amenable number.

7090431380 is an abundant number, since it is smaller than the sum of its proper divisors (8043573940).

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

7090431380 is a wasteful number, since it uses less digits than its factorization.

7090431380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811899 (or 5811897 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 7090431380 is about 84204.6992750405. The cubic root of 7090431380 is about 1921.1335338474.

The spelling of 7090431380 in words is "seven billion, ninety million, four hundred thirty-one thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 61 122 244 305 610 1220 5811829 11623658 23247316 29059145 58118290 116236580 354521569 709043138 1418086276 1772607845 3545215690 7090431380