648314538 has 32 divisors (see below), whose sum is σ = 1325376000. Its totient is φ = 211351536.

The previous prime is 648314503. The next prime is 648314539. The reversal of 648314538 is 835413846.

It is a self number, because there is not a number n which added to its sum of digits gives 648314538.

It is not an unprimeable number, because it can be changed into a prime (648314539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65845 + ... + 75047.

It is an arithmetic number, because the mean of its divisors is an integer number (41418000).

Almost surely, 2^648314538 is an apocalyptic number.

648314538 is an abundant number, since it is smaller than the sum of its proper divisors (677061462).

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

648314538 is a wasteful number, since it uses less digits than its factorization.

648314538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9466.

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

The square root of 648314538 is about 25462.0214829852. The cubic root of 648314538 is about 865.4897325906.

The spelling of 648314538 in words is "six hundred forty-eight million, three hundred fourteen thousand, five hundred thirty-eight".