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252424240 = 2453155303
BaseRepresentation
bin11110000101110…
…11000000110000
3122120222110221221
433002323000300
51004110033430
641014154424
76153366505
oct1702730060
9576873857
10252424240
1111a53a082
1270652a14
13403b0c73
142574b4ac
151726257a
hexf0bb030

252424240 has 20 divisors (see below), whose sum is σ = 586886544. Its totient is φ = 100969664.

The previous prime is 252424231. The next prime is 252424261. The reversal of 252424240 is 42424252.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577572 + ... + 1577731.

Almost surely, 2252424240 is an apocalyptic number.

252424240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252424240 is an abundant number, since it is smaller than the sum of its proper divisors (334462304).

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

252424240 is a wasteful number, since it uses less digits than its factorization.

252424240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155316 (or 3155310 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 252424240 is about 15887.8645512857. The cubic root of 252424240 is about 631.9902124212.

Adding to 252424240 its reverse (42424252), we get a palindrome (294848492).

The spelling of 252424240 in words is "two hundred fifty-two million, four hundred twenty-four thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 16 20 40 80 3155303 6310606 12621212 15776515 25242424 31553030 50484848 63106060 126212120 252424240