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258872061 = 3723535967
BaseRepresentation
bin11110110111000…
…01001011111101
3200001010001201010
433123201023331
51012232401221
641404305433
76262243020
oct1733411375
9601101633
10258872061
11123143458
1272842279
134182aa46
14265491b7
1517ad7c76
hexf6e12fd

258872061 has 16 divisors (see below), whose sum is σ = 411623424. Its totient is φ = 141495024.

The previous prime is 258872059. The next prime is 258872069. The reversal of 258872061 is 160278852.

It is not a de Polignac number, because 258872061 - 21 = 258872059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258872069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267501 + ... + 268466.

It is an arithmetic number, because the mean of its divisors is an integer number (25726464).

Almost surely, 2258872061 is an apocalyptic number.

258872061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

258872061 is a deficient number, since it is larger than the sum of its proper divisors (152751363).

258872061 is a wasteful number, since it uses less digits than its factorization.

258872061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536000.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 258872061 is about 16089.5015771154. The cubic root of 258872061 is about 637.3261335927.

The spelling of 258872061 in words is "two hundred fifty-eight million, eight hundred seventy-two thousand, sixty-one".

Divisors: 1 3 7 21 23 69 161 483 535967 1607901 3751769 11255307 12327241 36981723 86290687 258872061