647940130 has 32 divisors (see below), whose sum is σ = 1225943424. Its totient is φ = 246086016.

The previous prime is 647940077. The next prime is 647940173. The reversal of 647940130 is 31049746.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21229 + ... + 41791.

It is an arithmetic number, because the mean of its divisors is an integer number (38310732).

Almost surely, 2^647940130 is an apocalyptic number.

647940130 is a deficient number, since it is larger than the sum of its proper divisors (578003294).

647940130 is a wasteful number, since it uses less digits than its factorization.

647940130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20730.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 647940130 is about 25454.6681376914. The cubic root of 647940130 is about 865.3230909063.

Adding to 647940130 its reverse (31049746), we get a palindrome (678989876).

The spelling of 647940130 in words is "six hundred forty-seven million, nine hundred forty thousand, one hundred thirty".