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220420 = 225103107
BaseRepresentation
bin110101110100000100
3102012100201
4311310010
524023140
64420244
71605424
oct656404
9365321
10220420
11140672
12a7684
1379435
145a484
154549a
hex35d04

220420 has 24 divisors (see below), whose sum is σ = 471744. Its totient is φ = 86496.

The previous prime is 220411. The next prime is 220421. The reversal of 220420 is 24022.

It is a happy number.

220420 is nontrivially palindromic in base 6.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 220397 and 220406.

It is not an unprimeable number, because it can be changed into a prime (220421) 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, 2007 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2220420 is an apocalyptic number.

220420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220420 is an abundant number, since it is smaller than the sum of its proper divisors (251324).

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

220420 is a wasteful number, since it uses less digits than its factorization.

220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 220420 is about 469.4890840052. The cubic root of 220420 is about 60.4064990156.

Adding to 220420 its reverse (24022), we get a palindrome (244442).

The spelling of 220420 in words is "two hundred twenty thousand, four hundred twenty", and thus it is an iban number.