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213930 = 23252377
BaseRepresentation
bin110100001110101010
3101212110100
4310032222
523321210
64330230
71550463
oct641652
9355410
10213930
11136802
12a3976
13764b2
1457d6a
15435c0
hex343aa

213930 has 24 divisors (see below), whose sum is σ = 556452. Its totient is φ = 57024.

The previous prime is 213929. The next prime is 213943. The reversal of 213930 is 39312.

213930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 210681 + 3249 = 459^2 + 57^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1099 + ... + 1278.

2213930 is an apocalyptic number.

213930 is an abundant number, since it is smaller than the sum of its proper divisors (342522).

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

213930 is a wasteful number, since it uses less digits than its factorization.

213930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390 (or 2387 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 213930 is about 462.5256749630. The cubic root of 213930 is about 59.8077177841.

The spelling of 213930 in words is "two hundred thirteen thousand, nine hundred thirty".