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382638813 = 31791973617
BaseRepresentation
bin10110110011101…
…001101011011101
3222200000001202220
4112303221223131
51240423420223
6101545135553
712324243024
oct2663515335
9880001686
10382638813
11186a98227
12a818a5b9
13613732cb
1438b658bb
15238d46e3
hex16ce9add

382638813 has 16 divisors (see below), whose sum is σ = 515782080. Its totient is φ = 252310016.

The previous prime is 382638769. The next prime is 382638821. The reversal of 382638813 is 318836283.

It is a cyclic number.

It is not a de Polignac number, because 382638813 - 26 = 382638749 is a prime.

It is a super-2 number, since 2×3826388132 = 292824922428097938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (382638863) 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, 103981 + ... + 107597.

It is an arithmetic number, because the mean of its divisors is an integer number (32236380).

Almost surely, 2382638813 is an apocalyptic number.

It is an amenable number.

382638813 is a deficient number, since it is larger than the sum of its proper divisors (133143267).

382638813 is a wasteful number, since it uses less digits than its factorization.

382638813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996.

The product of its digits is 165888, while the sum is 42.

The square root of 382638813 is about 19561.1557173905. The cubic root of 382638813 is about 725.9883866882.

The spelling of 382638813 in words is "three hundred eighty-two million, six hundred thirty-eight thousand, eight hundred thirteen".

Divisors: 1 3 179 197 537 591 3617 10851 35263 105789 647443 712549 1942329 2137647 127546271 382638813