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387023055 = 35157164341
BaseRepresentation
bin10111000100011…
…000000011001111
3222222020210211020
4113010120003033
51243034214210
6102223125223
712406433046
oct2704300317
9888223736
10387023055
11189512171
12a9743813
1362249a33
143958755d
1523e9d770
hex171180cf

387023055 has 16 divisors (see below), whose sum is σ = 623184864. Its totient is φ = 205096320.

The previous prime is 387023041. The next prime is 387023083. The reversal of 387023055 is 550320783.

It is not a de Polignac number, because 387023055 - 29 = 387022543 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79816 + ... + 84525.

It is an arithmetic number, because the mean of its divisors is an integer number (38949054).

Almost surely, 2387023055 is an apocalyptic number.

387023055 is a deficient number, since it is larger than the sum of its proper divisors (236161809).

387023055 is a wasteful number, since it uses less digits than its factorization.

387023055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164506.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 387023055 is about 19672.9015399356. The cubic root of 387023055 is about 728.7506339809.

The spelling of 387023055 in words is "three hundred eighty-seven million, twenty-three thousand, fifty-five".

Divisors: 1 3 5 15 157 471 785 2355 164341 493023 821705 2465115 25801537 77404611 129007685 387023055