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139528 = 23107163
BaseRepresentation
bin100010000100001000
321002101201
4202010020
513431103
62553544
71120534
oct420410
9232351
10139528
1195914
12688b4
134b67c
1438bc4
152b51d
hex22108

139528 has 16 divisors (see below), whose sum is σ = 265680. Its totient is φ = 68688.

The previous prime is 139511. The next prime is 139537. The reversal of 139528 is 825931.

It is a junction number, because it is equal to n+sod(n) for n = 139496 and 139505.

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, 775 + ... + 937.

It is an arithmetic number, because the mean of its divisors is an integer number (16605).

2139528 is an apocalyptic number.

It is an amenable number.

139528 is a deficient number, since it is larger than the sum of its proper divisors (126152).

139528 is a wasteful number, since it uses less digits than its factorization.

139528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 272 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 139528 is about 373.5344696276. The cubic root of 139528 is about 51.8665215737.

It can be divided in two parts, 1395 and 28, that multiplied together give a triangular number (39060 = T279).

The spelling of 139528 in words is "one hundred thirty-nine thousand, five hundred twenty-eight".

Divisors: 1 2 4 8 107 163 214 326 428 652 856 1304 17441 34882 69764 139528