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380233188 = 223210562033
BaseRepresentation
bin10110101010011…
…110010111100100
3222111110211212200
4112222132113210
51234314430223
6101421414500
712264633366
oct2652362744
9874424780
10380233188
111856a4905
12a740a430
1360a1036a
14386dad36
15235aba43
hex16a9e5e4

380233188 has 18 divisors (see below), whose sum is σ = 961145094. Its totient is φ = 126744384.

The previous prime is 380233177. The next prime is 380233193. The reversal of 380233188 is 881332083.

It can be written as a sum of positive squares in only one way, i.e., 275825664 + 104407524 = 16608^2 + 10218^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 10562033 = 380233188 / (3 + 8 + 0 + 2 + 3 + 3 + 1 + 8 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5280981 + ... + 5281052.

Almost surely, 2380233188 is an apocalyptic number.

It is an amenable number.

380233188 is an abundant number, since it is smaller than the sum of its proper divisors (580911906).

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

380233188 is a wasteful number, since it uses less digits than its factorization.

380233188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10562043 (or 10562038 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 380233188 is about 19499.5689183120. The cubic root of 380233188 is about 724.4637734488.

The spelling of 380233188 in words is "three hundred eighty million, two hundred thirty-three thousand, one hundred eighty-eight".

Divisors: 1 2 3 4 6 9 12 18 36 10562033 21124066 31686099 42248132 63372198 95058297 126744396 190116594 380233188