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388035061 = 1213319897
BaseRepresentation
bin10111001000001…
…111000111110101
31000001011020000221
4113020033013311
51243314110221
6102300534341
712421146361
oct2710170765
91001136027
10388035061
1118a043537
12a9b513b1
136251255b
143976c2a1
15240ed541
hex1720f1f5

388035061 has 4 divisors (see below), whose sum is σ = 388356172. Its totient is φ = 387713952.

The previous prime is 388035023. The next prime is 388035083. The reversal of 388035061 is 160530883.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160530883 = 333148193.

It can be written as a sum of positive squares in 2 ways, for example, as 139972561 + 248062500 = 11831^2 + 15750^2 .

It is a cyclic number.

It is not a de Polignac number, because 388035061 - 211 = 388033013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388065061) 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, 158736 + ... + 161161.

It is an arithmetic number, because the mean of its divisors is an integer number (97089043).

Almost surely, 2388035061 is an apocalyptic number.

It is an amenable number.

388035061 is a deficient number, since it is larger than the sum of its proper divisors (321111).

388035061 is a wasteful number, since it uses less digits than its factorization.

388035061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321110.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 388035061 is about 19698.6055597852. The cubic root of 388035061 is about 729.3852715650.

The spelling of 388035061 in words is "three hundred eighty-eight million, thirty-five thousand, sixty-one".

Divisors: 1 1213 319897 388035061