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253036660 = 22512651833
BaseRepresentation
bin11110001010100…
…00100001110100
3122122010121001011
433011100201310
51004234133120
641035242004
76161530132
oct1705204164
9578117034
10253036660
1111a918208
12708a9304
1340566946
142586a752
1517333c5a
hexf150874

253036660 has 12 divisors (see below), whose sum is σ = 531377028. Its totient is φ = 101214656.

The previous prime is 253036621. The next prime is 253036669. The reversal of 253036660 is 66630352.

It can be written as a sum of positive squares in 2 ways, for example, as 177102864 + 75933796 = 13308^2 + 8714^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253036669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6325897 + ... + 6325936.

It is an arithmetic number, because the mean of its divisors is an integer number (44281419).

Almost surely, 2253036660 is an apocalyptic number.

253036660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253036660 is an abundant number, since it is smaller than the sum of its proper divisors (278340368).

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

253036660 is a wasteful number, since it uses less digits than its factorization.

253036660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12651842 (or 12651840 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 253036660 is about 15907.1260760704. The cubic root of 253036660 is about 632.5009014345.

The spelling of 253036660 in words is "two hundred fifty-three million, thirty-six thousand, six hundred sixty".

Divisors: 1 2 4 5 10 20 12651833 25303666 50607332 63259165 126518330 253036660