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130878023 = 1921812003
BaseRepresentation
bin1111100110100…
…00101001000111
3100010021021220012
413303100221013
5232001044043
620553100435
73146305403
oct763205107
9303237805
10130878023
1167971661
12379b771b
1321165323
141354c103
15b753a18
hex7cd0a47

130878023 has 12 divisors (see below), whose sum is σ = 138961368. Its totient is φ = 123243120.

The previous prime is 130878017. The next prime is 130878037. The reversal of 130878023 is 320878031.

It is not a de Polignac number, because 130878023 - 26 = 130877959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130878043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64340 + ... + 66342.

It is an arithmetic number, because the mean of its divisors is an integer number (11580114).

Almost surely, 2130878023 is an apocalyptic number.

130878023 is a deficient number, since it is larger than the sum of its proper divisors (8083345).

130878023 is a wasteful number, since it uses less digits than its factorization.

130878023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222 (or 2203 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 130878023 is about 11440.1933113038. The cubic root of 130878023 is about 507.7176275492.

The spelling of 130878023 in words is "one hundred thirty million, eight hundred seventy-eight thousand, twenty-three".

Divisors: 1 19 181 361 2003 3439 38057 65341 362543 723083 6888317 130878023