648657418 has 8 divisors (see below), whose sum is σ = 987508512. Its totient is φ = 319487916.

The previous prime is 648657391. The next prime is 648657419. The reversal of 648657418 is 814756846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (648657419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2420230 + ... + 2420497.

It is an arithmetic number, because the mean of its divisors is an integer number (123438564).

Almost surely, 2^648657418 is an apocalyptic number.

648657418 is a deficient number, since it is larger than the sum of its proper divisors (338851094).

648657418 is a wasteful number, since it uses less digits than its factorization.

648657418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840796.

The product of its digits is 1290240, while the sum is 49.

The square root of 648657418 is about 25468.7537582819. The cubic root of 648657418 is about 865.6422855059.

The spelling of 648657418 in words is "six hundred forty-eight million, six hundred fifty-seven thousand, four hundred eighteen".