130223440 has 20 divisors (see below), whose sum is σ = 302769684. Its totient is φ = 52089344.

The previous prime is 130223437. The next prime is 130223477. The reversal of 130223440 is 44322031.

It can be written as a sum of positive squares in 2 ways, for example, as 36288576 + 93934864 = 6024^2 + 9692^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 813817 + ... + 813976.

Almost surely, 2^130223440 is an apocalyptic number.

130223440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130223440 is an abundant number, since it is smaller than the sum of its proper divisors (172546244).

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

130223440 is a wasteful number, since it uses less digits than its factorization.

130223440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627806 (or 1627800 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 130223440 is about 11411.5485364608. The cubic root of 130223440 is about 506.8697669901.

Adding to 130223440 its reverse (44322031), we get a palindrome (174545471).

It can be divided in two parts, 1302 and 23440, that added together give a palindrome (24742).

The spelling of 130223440 in words is "one hundred thirty million, two hundred twenty-three thousand, four hundred forty".