648686874 has 32 divisors (see below), whose sum is σ = 1417268160. Its totient is φ = 196300800.

The previous prime is 648686827. The next prime is 648686891. The reversal of 648686874 is 478686846.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44364 + ... + 57144.

It is an arithmetic number, because the mean of its divisors is an integer number (44289630).

Almost surely, 2^648686874 is an apocalyptic number.

648686874 is an abundant number, since it is smaller than the sum of its proper divisors (768581286).

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

648686874 is a wasteful number, since it uses less digits than its factorization.

648686874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13566.

The product of its digits is 12386304, while the sum is 57.

The square root of 648686874 is about 25469.3320289324. The cubic root of 648686874 is about 865.6553884539.

The spelling of 648686874 in words is "six hundred forty-eight million, six hundred eighty-six thousand, eight hundred seventy-four".