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380204881 = 71723532621
BaseRepresentation
bin10110101010010…
…111011101010001
3222111102102001021
4112222113131101
51234313024011
6101421035441
712264455020
oct2652273521
9874372037
10380204881
11185685611
12a73b5b81
1360a00504
14386d08b7
15235a3471
hex16a97751

380204881 has 32 divisors (see below), whose sum is σ = 489328128. Its totient is φ = 287738880.

The previous prime is 380204873. The next prime is 380204899. The reversal of 380204881 is 188402083.

It is a cyclic number.

It is not a de Polignac number, because 380204881 - 23 = 380204873 is a prime.

It is a super-2 number, since 2×3802048812 = 289111503072448322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (380204821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143751 + ... + 146371.

It is an arithmetic number, because the mean of its divisors is an integer number (15291504).

Almost surely, 2380204881 is an apocalyptic number.

It is an amenable number.

380204881 is a deficient number, since it is larger than the sum of its proper divisors (109123247).

380204881 is a wasteful number, since it uses less digits than its factorization.

380204881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 380204881 is about 19498.8430682438. The cubic root of 380204881 is about 724.4457950909.

The spelling of 380204881 in words is "three hundred eighty million, two hundred four thousand, eight hundred eighty-one".

Divisors: 1 7 17 23 53 119 161 371 391 901 1219 2621 2737 6307 8533 18347 20723 44557 60283 138913 145061 311899 421981 972391 1024811 2361521 3194999 7173677 16530647 22364993 54314983 380204881