Search a number
-
+
130430420 = 2256521521
BaseRepresentation
bin1111100011000…
…11010111010100
3100002102112220022
413301203113110
5231342233140
620535324312
73142432421
oct761432724
9302375808
10130430420
116769633a
1237820698
1321039683
1413472d48
15b6b60b5
hex7c635d4

130430420 has 12 divisors (see below), whose sum is σ = 273903924. Its totient is φ = 52172160.

The previous prime is 130430411. The next prime is 130430449. The reversal of 130430420 is 24034031.

It can be written as a sum of positive squares in 2 ways, for example, as 14394436 + 116035984 = 3794^2 + 10772^2 .

It is a super-2 number, since 2×1304304202 = 34024188922752800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3260741 + ... + 3260780.

It is an arithmetic number, because the mean of its divisors is an integer number (22825327).

Almost surely, 2130430420 is an apocalyptic number.

130430420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130430420 is an abundant number, since it is smaller than the sum of its proper divisors (143473504).

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

130430420 is a wasteful number, since it uses less digits than its factorization.

130430420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521530 (or 6521528 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 130430420 is about 11420.6138188803. The cubic root of 130430420 is about 507.1381681583.

Adding to 130430420 its reverse (24034031), we get a palindrome (154464451).

The spelling of 130430420 in words is "one hundred thirty million, four hundred thirty thousand, four hundred twenty".

Divisors: 1 2 4 5 10 20 6521521 13043042 26086084 32607605 65215210 130430420