130043728 has 20 divisors (see below), whose sum is σ = 253569460. Its totient is φ = 64606464.

The previous prime is 130043723. The next prime is 130043737. The reversal of 130043728 is 827340031.

It can be written as a sum of positive squares in 2 ways, for example, as 55532304 + 74511424 = 7452^2 + 8632^2 .

It is a super-2 number, since 2×130043728² = 33822742384275968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 130043696 and 130043705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130043723) 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, 23373 + ... + 28396.

It is an arithmetic number, because the mean of its divisors is an integer number (12678473).

Almost surely, 2^130043728 is an apocalyptic number.

It is an amenable number.

130043728 is a deficient number, since it is larger than the sum of its proper divisors (123525732).

130043728 is a wasteful number, since it uses less digits than its factorization.

130043728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51934 (or 51928 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 130043728 is about 11403.6716894165. The cubic root of 130043728 is about 506.6364948177.

Adding to 130043728 its reverse (827340031), we get a palindrome (957383759).

The spelling of 130043728 in words is "one hundred thirty million, forty-three thousand, seven hundred twenty-eight".