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259640 = 2356491
BaseRepresentation
bin111111011000111000
3111012011022
4333120320
531302030
65322012
72130653
oct773070
9435138
10259640
11168087
12106308
1391244
146a89a
1551de5
hex3f638

259640 has 16 divisors (see below), whose sum is σ = 584280. Its totient is φ = 103840.

The previous prime is 259639. The next prime is 259643. The reversal of 259640 is 46952.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 259640.

It is not an unprimeable number, because it can be changed into a prime (259643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3206 + ... + 3285.

2259640 is an apocalyptic number.

259640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

259640 is an abundant number, since it is smaller than the sum of its proper divisors (324640).

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

259640 is a wasteful number, since it uses less digits than its factorization.

259640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6502 (or 6498 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 259640 is about 509.5488200359. The cubic root of 259640 is about 63.7955716701.

The spelling of 259640 in words is "two hundred fifty-nine thousand, six hundred forty".

Divisors: 1 2 4 5 8 10 20 40 6491 12982 25964 32455 51928 64910 129820 259640