648068538 has 16 divisors (see below), whose sum is σ = 1395840096. Its totient is φ = 199405680.

The previous prime is 648068537. The next prime is 648068569. The reversal of 648068538 is 835860846.

It is not an unprimeable number, because it can be changed into a prime (648068537) 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, 4154208 + ... + 4154363.

It is an arithmetic number, because the mean of its divisors is an integer number (87240006).

Almost surely, 2^648068538 is an apocalyptic number.

648068538 is an abundant number, since it is smaller than the sum of its proper divisors (747771558).

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

648068538 is a wasteful number, since it uses less digits than its factorization.

648068538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8308589.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 648068538 is about 25457.1903005811. The cubic root of 648068538 is about 865.3802500290.

The spelling of 648068538 in words is "six hundred forty-eight million, sixty-eight thousand, five hundred thirty-eight".