648213340 has 24 divisors (see below), whose sum is σ = 1363631472. Its totient is φ = 258831360.

The previous prime is 648213287. The next prime is 648213341. The reversal of 648213340 is 43312846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648213341) 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, 16546 + ... + 39625.

It is an arithmetic number, because the mean of its divisors is an integer number (56817978).

Almost surely, 2^648213340 is an apocalyptic number.

It is an amenable number.

648213340 is an abundant number, since it is smaller than the sum of its proper divisors (715418132).

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

648213340 is a wasteful number, since it uses less digits than its factorization.

648213340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56757 (or 56755 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 648213340 is about 25460.0341712261. The cubic root of 648213340 is about 865.4446976668. Note that the first 3 decimals are identical.

The spelling of 648213340 in words is "six hundred forty-eight million, two hundred thirteen thousand, three hundred forty".