648357444 has 108 divisors (see below), whose sum is σ = 1977079104. Its totient is φ = 175470624.

The previous prime is 648357377. The next prime is 648357491. The reversal of 648357444 is 444753846.

It is a self number, because there is not a number n which added to its sum of digits gives 648357444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 87409 + ... + 94535.

It is an arithmetic number, because the mean of its divisors is an integer number (18306288).

Almost surely, 2^648357444 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 648357444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (988539552).

648357444 is an abundant number, since it is smaller than the sum of its proper divisors (1328721660).

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

648357444 is a wasteful number, since it uses less digits than its factorization.

648357444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182 (or 7158 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 45.

The square root of 648357444 is about 25462.8640180165. The cubic root of 648357444 is about 865.5088251150.

The spelling of 648357444 in words is "six hundred forty-eight million, three hundred fifty-seven thousand, four hundred forty-four".