648430940 has 24 divisors (see below), whose sum is σ = 1369865952. Its totient is φ = 257817920.

The previous prime is 648430933. The next prime is 648430961. The reversal of 648430940 is 49034846.

It is a junction number, because it is equal to n+sod(n) for n = 648430894 and 648430903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93731 + ... + 100410.

It is an arithmetic number, because the mean of its divisors is an integer number (57077748).

Almost surely, 2^648430940 is an apocalyptic number.

It is an amenable number.

648430940 is an abundant number, since it is smaller than the sum of its proper divisors (721435012).

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

648430940 is a wasteful number, since it uses less digits than its factorization.

648430940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194317 (or 194315 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 648430940 is about 25464.3071769094. The cubic root of 648430940 is about 865.5415277719.

The spelling of 648430940 in words is "six hundred forty-eight million, four hundred thirty thousand, nine hundred forty".