130444728 has 32 divisors (see below), whose sum is σ = 343276800. Its totient is φ = 41192928.

The previous prime is 130444703. The next prime is 130444729. The reversal of 130444728 is 827444031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130444729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142576 + ... + 143487.

It is an arithmetic number, because the mean of its divisors is an integer number (10727400).

Almost surely, 2^130444728 is an apocalyptic number.

It is an amenable number.

130444728 is an abundant number, since it is smaller than the sum of its proper divisors (212832072).

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

130444728 is a wasteful number, since it uses less digits than its factorization.

130444728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286091 (or 286087 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 130444728 is about 11421.2402128666. The cubic root of 130444728 is about 507.1567115513.

Adding to 130444728 its reverse (827444031), we get a palindrome (957888759).

The spelling of 130444728 in words is "one hundred thirty million, four hundred forty-four thousand, seven hundred twenty-eight".