648886938 has 16 divisors (see below), whose sum is σ = 1483170240. Its totient is φ = 185396256.

The previous prime is 648886933. The next prime is 648886939. The reversal of 648886938 is 839688846.

It is not an unprimeable number, because it can be changed into a prime (648886933) 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, 7724803 + ... + 7724886.

It is an arithmetic number, because the mean of its divisors is an integer number (92698140).

Almost surely, 2^648886938 is an apocalyptic number.

648886938 is an abundant number, since it is smaller than the sum of its proper divisors (834283302).

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

648886938 is a wasteful number, since it uses less digits than its factorization.

648886938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15449701.

The product of its digits is 15925248, while the sum is 60.

The square root of 648886938 is about 25473.2592732065. The cubic root of 648886938 is about 865.7443726697.

The spelling of 648886938 in words is "six hundred forty-eight million, eight hundred eighty-six thousand, nine hundred thirty-eight".