Search a number
-
+
30412420 = 2251520621
BaseRepresentation
bin111010000000…
…0111010000100
32010020002222221
41310000322010
530241144140
63003502124
7516333643
oct164007204
963202887
1030412420
1116192335
12a227944
1363ba91c
14407935a
152a0b14a
hex1d00e84

30412420 has 12 divisors (see below), whose sum is σ = 63866124. Its totient is φ = 12164960.

The previous prime is 30412397. The next prime is 30412423. The reversal of 30412420 is 2421403.

It can be written as a sum of positive squares in 2 ways, for example, as 10036224 + 20376196 = 3168^2 + 4514^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30412394 and 30412403.

It is not an unprimeable number, because it can be changed into a prime (30412423) 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, 760291 + ... + 760330.

It is an arithmetic number, because the mean of its divisors is an integer number (5322177).

Almost surely, 230412420 is an apocalyptic number.

It is an amenable number.

30412420 is an abundant number, since it is smaller than the sum of its proper divisors (33453704).

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

30412420 is a wasteful number, since it uses less digits than its factorization.

30412420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520630 (or 1520628 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 30412420 is about 5514.7456876995. The cubic root of 30412420 is about 312.1406471949.

Adding to 30412420 its reverse (2421403), we get a palindrome (32833823).

The spelling of 30412420 in words is "thirty million, four hundred twelve thousand, four hundred twenty".

Divisors: 1 2 4 5 10 20 1520621 3041242 6082484 7603105 15206210 30412420