648378750 has 80 divisors (see below), whose sum is σ = 1664579664. Its totient is φ = 168192000.

The previous prime is 648378737. The next prime is 648378767. The reversal of 648378750 is 57873846.

It is a self number, because there is not a number n which added to its sum of digits gives 648378750.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 136414 + ... + 141086.

Almost surely, 2^648378750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648378750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832289832).

648378750 is an abundant number, since it is smaller than the sum of its proper divisors (1016200914).

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

648378750 is a wasteful number, since it uses less digits than its factorization.

648378750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4735 (or 4720 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The square root of 648378750 is about 25463.2823885688. The cubic root of 648378750 is about 865.5183056514.

The spelling of 648378750 in words is "six hundred forty-eight million, three hundred seventy-eight thousand, seven hundred fifty".