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55236720 = 2435731161
BaseRepresentation
bin1101001010110…
…1100001110000
310211221022112110
43102231201300
5103120033340
65251525320
71240335000
oct322554160
9124838473
1055236720
11291a8190
12165b9840
13b59cb66
14749c000
154cb1680
hex34ad870

55236720 has 320 divisors, whose sum is σ = 221414400. Its totient is φ = 11289600.

The previous prime is 55236719. The next prime is 55236739. The reversal of 55236720 is 2763255.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 905490 + ... + 905550.

It is an arithmetic number, because the mean of its divisors is an integer number (691920).

Almost surely, 255236720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55236720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110707200).

55236720 is an abundant number, since it is smaller than the sum of its proper divisors (166177680).

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

55236720 is a wasteful number, since it uses less digits than its factorization.

55236720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 55236720 is about 7432.1410105030. The cubic root of 55236720 is about 380.8400621058.

Adding to 55236720 its reverse (2763255), we get a palindrome (57999975).

The spelling of 55236720 in words is "fifty-five million, two hundred thirty-six thousand, seven hundred twenty".