648620835 has 8 divisors (see below), whose sum is σ = 1037793360. Its totient is φ = 345931104.

The previous prime is 648620831. The next prime is 648620887. The reversal of 648620835 is 538026846.

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

It is not a de Polignac number, because 648620835 - 2² = 648620831 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (648620831) 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, 21620680 + ... + 21620709.

It is an arithmetic number, because the mean of its divisors is an integer number (129724170).

Almost surely, 2^648620835 is an apocalyptic number.

648620835 is a deficient number, since it is larger than the sum of its proper divisors (389172525).

648620835 is a wasteful number, since it uses less digits than its factorization.

648620835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43241397.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 648620835 is about 25468.0355543964. The cubic root of 648620835 is about 865.6260116937.

The spelling of 648620835 in words is "six hundred forty-eight million, six hundred twenty thousand, eight hundred thirty-five".