648396970 has 16 divisors (see below), whose sum is σ = 1256892840. Its totient is φ = 239408064.

The previous prime is 648396901. The next prime is 648396971. The reversal of 648396970 is 79693846.

It can be written as a sum of positive squares in 4 ways, for example, as 512977201 + 135419769 = 22649^2 + 11637^2 .

It is not an unprimeable number, because it can be changed into a prime (648396971) 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, 2493705 + ... + 2493964.

Almost surely, 2^648396970 is an apocalyptic number.

648396970 is a deficient number, since it is larger than the sum of its proper divisors (608495870).

648396970 is a wasteful number, since it uses less digits than its factorization.

648396970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4987689.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 648396970 is about 25463.6401561128. The cubic root of 648396970 is about 865.5264128448.

The spelling of 648396970 in words is "six hundred forty-eight million, three hundred ninety-six thousand, nine hundred seventy".