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380980 = 22543443
BaseRepresentation
bin1011101000000110100
3201100121101
41131000310
544142410
612055444
73144505
oct1350064
9640541
10380980
11240266
12164584
13104542
149cbac
1577d3a
hex5d034

380980 has 24 divisors (see below), whose sum is σ = 820512. Its totient is φ = 148512.

The previous prime is 380977. The next prime is 380983. The reversal of 380980 is 89083.

It is an interprime number because it is at equal distance from previous prime (380977) and next prime (380983).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639 + ... + 1081.

It is an arithmetic number, because the mean of its divisors is an integer number (34188).

2380980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 380980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410256).

380980 is an abundant number, since it is smaller than the sum of its proper divisors (439532).

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

380980 is a wasteful number, since it uses less digits than its factorization.

380980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 380980 is about 617.2357734286. The cubic root of 380980 is about 72.4937767151.

The spelling of 380980 in words is "three hundred eighty thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 43 86 172 215 430 443 860 886 1772 2215 4430 8860 19049 38098 76196 95245 190490 380980