648418540 has 96 divisors (see below), whose sum is σ = 1756339200. Its totient is φ = 195121920.

The previous prime is 648418531. The next prime is 648418541. The reversal of 648418540 is 45814846.

It is a junction number, because it is equal to n+sod(n) for n = 648418493 and 648418502.

It is not an unprimeable number, because it can be changed into a prime (648418541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37401 + ... + 51919.

It is an arithmetic number, because the mean of its divisors is an integer number (18295200).

Almost surely, 2^648418540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648418540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878169600).

648418540 is an abundant number, since it is smaller than the sum of its proper divisors (1107920660).

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

648418540 is a wasteful number, since it uses less digits than its factorization.

648418540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14575 (or 14573 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 648418540 is about 25464.0636976897. The cubic root of 648418540 is about 865.5360104620.

The spelling of 648418540 in words is "six hundred forty-eight million, four hundred eighteen thousand, five hundred forty".