130840644 has 24 divisors (see below), whose sum is σ = 333049248. Its totient is φ = 39648640.

The previous prime is 130840643. The next prime is 130840649. The reversal of 130840644 is 446048031.

It is not an unprimeable number, because it can be changed into a prime (130840643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495477 + ... + 495740.

It is an arithmetic number, because the mean of its divisors is an integer number (13877052).

Almost surely, 2^130840644 is an apocalyptic number.

It is an amenable number.

130840644 is an abundant number, since it is smaller than the sum of its proper divisors (202208604).

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

130840644 is a wasteful number, since it uses less digits than its factorization.

130840644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991235 (or 991233 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 130840644 is about 11438.5595246954. The cubic root of 130840644 is about 507.6692879228.

Adding to 130840644 its reverse (446048031), we get a palindrome (576888675).

The spelling of 130840644 in words is "one hundred thirty million, eight hundred forty thousand, six hundred forty-four".