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380621471 = 1920032709
BaseRepresentation
bin10110101011111…
…101001010011111
3222112012120111112
4112223331022133
51234414341341
6101434012235
712301141406
oct2653751237
9875176445
10380621471
1118593a5aa
12a757707b
1360b18009
143879c63d
1523636aeb
hex16afd29f

380621471 has 4 divisors (see below), whose sum is σ = 400654200. Its totient is φ = 360588744.

The previous prime is 380621467. The next prime is 380621473. The reversal of 380621471 is 174126083.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 380621471 - 22 = 380621467 is a prime.

It is a super-3 number, since 3×3806214713 (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380621473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10016336 + ... + 10016373.

It is an arithmetic number, because the mean of its divisors is an integer number (100163550).

Almost surely, 2380621471 is an apocalyptic number.

380621471 is a deficient number, since it is larger than the sum of its proper divisors (20032729).

380621471 is a wasteful number, since it uses less digits than its factorization.

380621471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20032728.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 380621471 is about 19509.5225723235. The cubic root of 380621471 is about 724.7102899548.

The spelling of 380621471 in words is "three hundred eighty million, six hundred twenty-one thousand, four hundred seventy-one".

Divisors: 1 19 20032709 380621471