Search a number
-
+
508385143 = 7237280411
BaseRepresentation
bin11110010011010…
…101011101110111
31022102121122022101
4132103111131313
52020121311033
6122240242531
715412126300
oct3623253567
91272548271
10508385143
11240a74312
12122310447
138142c916
144b7397a7
152e97297d
hex1e4d5777

508385143 has 12 divisors (see below), whose sum is σ = 607372392. Its totient is φ = 423979920.

The previous prime is 508385113. The next prime is 508385149. The reversal of 508385143 is 341583805.

It is not a de Polignac number, because 508385143 - 225 = 474830711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (508385149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138393 + ... + 142018.

It is an arithmetic number, because the mean of its divisors is an integer number (50614366).

Almost surely, 2508385143 is an apocalyptic number.

508385143 is a deficient number, since it is larger than the sum of its proper divisors (98987249).

508385143 is a wasteful number, since it uses less digits than its factorization.

508385143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280462 (or 280455 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 508385143 is about 22547.3976990694. The cubic root of 508385143 is about 798.1128136393.

The spelling of 508385143 in words is "five hundred eight million, three hundred eighty-five thousand, one hundred forty-three".

Divisors: 1 7 37 49 259 1813 280411 1962877 10375207 13740139 72626449 508385143