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286682380 = 22571201889
BaseRepresentation
bin10001000101100…
…110110100001100
3201222102222021221
4101011212310030
51041342314010
644240333124
710050521455
oct2105466414
9658388257
10286682380
11137908796
12800141a4
134751715a
142a10812c
151a27cdda
hex11166d0c

286682380 has 24 divisors (see below), whose sum is σ = 610515360. Its totient is φ = 113057280.

The previous prime is 286682377. The next prime is 286682381. The reversal of 286682380 is 83286682.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (286682381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99525 + ... + 102364.

It is an arithmetic number, because the mean of its divisors is an integer number (25438140).

Almost surely, 2286682380 is an apocalyptic number.

286682380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286682380 is an abundant number, since it is smaller than the sum of its proper divisors (323832980).

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

286682380 is a wasteful number, since it uses less digits than its factorization.

286682380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201969 (or 201967 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 286682380 is about 16931.6974931635. The cubic root of 286682380 is about 659.3768069101.

The spelling of 286682380 in words is "two hundred eighty-six million, six hundred eighty-two thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 71 142 284 355 710 1420 201889 403778 807556 1009445 2018890 4037780 14334119 28668238 57336476 71670595 143341190 286682380