Search a number
-
+
138539578 = 2491141079
BaseRepresentation
bin10000100000111…
…11001000111010
3100122200112120111
420100133020322
5240431231303
621425214534
73301365322
oct1020371072
9318615514
10138539578
1171224921
123a49144a
13229186a8
1414584282
15c268b6d
hex841f23a

138539578 has 8 divisors (see below), whose sum is σ = 208234080. Its totient is φ = 69128220.

The previous prime is 138539563. The next prime is 138539617. The reversal of 138539578 is 875935831.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 69558 + ... + 71521.

It is an arithmetic number, because the mean of its divisors is an integer number (26029260).

Almost surely, 2138539578 is an apocalyptic number.

138539578 is a deficient number, since it is larger than the sum of its proper divisors (69694502).

138539578 is a wasteful number, since it uses less digits than its factorization.

138539578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141572.

The product of its digits is 907200, while the sum is 49.

The square root of 138539578 is about 11770.2836839220. The cubic root of 138539578 is about 517.4375637837.

The spelling of 138539578 in words is "one hundred thirty-eight million, five hundred thirty-nine thousand, five hundred seventy-eight".

Divisors: 1 2 491 982 141079 282158 69269789 138539578