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308020 = 22515401
BaseRepresentation
bin1001011001100110100
3120122112011
41023030310
534324040
610334004
72422006
oct1131464
9518464
10308020
111a0469
1212a304
13aa27b
1480376
15613ea
hex4b334

308020 has 12 divisors (see below), whose sum is σ = 646884. Its totient is φ = 123200.

The previous prime is 308017. The next prime is 308027. The reversal of 308020 is 20803.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 71824 = 486^2 + 268^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7681 + ... + 7720.

It is an arithmetic number, because the mean of its divisors is an integer number (53907).

2308020 is an apocalyptic number.

It is an amenable number.

308020 is an abundant number, since it is smaller than the sum of its proper divisors (338864).

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

308020 is a wasteful number, since it uses less digits than its factorization.

308020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15410 (or 15408 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 308020 is about 554.9954954772. The cubic root of 308020 is about 67.5345958915.

Adding to 308020 its reverse (20803), we get a palindrome (328823).

The spelling of 308020 in words is "three hundred eight thousand, twenty".

Divisors: 1 2 4 5 10 20 15401 30802 61604 77005 154010 308020