Search a number
-
+
130628830 = 2517972977
BaseRepresentation
bin1111100100100…
…11110011011110
3100002210122001211
413302103303132
5231420110310
620543455034
73144220033
oct762236336
9302718054
10130628830
1167811412
12378b747a
13210a8a87
14134c538a
15b704c8a
hex7c93cde

130628830 has 16 divisors (see below), whose sum is σ = 236448720. Its totient is φ = 51958912.

The previous prime is 130628809. The next prime is 130628831. The reversal of 130628830 is 38826031.

It is a junction number, because it is equal to n+sod(n) for n = 130628792 and 130628801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130628831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34699 + ... + 38278.

It is an arithmetic number, because the mean of its divisors is an integer number (14778045).

Almost surely, 2130628830 is an apocalyptic number.

130628830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

130628830 is a deficient number, since it is larger than the sum of its proper divisors (105819890).

130628830 is a wasteful number, since it uses less digits than its factorization.

130628830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73163.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 130628830 is about 11429.2970037531. The cubic root of 130628830 is about 507.3951897578.

The spelling of 130628830 in words is "one hundred thirty million, six hundred twenty-eight thousand, eight hundred thirty".

Divisors: 1 2 5 10 179 358 895 1790 72977 145954 364885 729770 13062883 26125766 65314415 130628830