648332724 has 48 divisors (see below), whose sum is σ = 1638628992. Its totient is φ = 198325632.

The previous prime is 648332719. The next prime is 648332743. The reversal of 648332724 is 427233846.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14977 + ... + 38999.

It is an arithmetic number, because the mean of its divisors is an integer number (34138104).

Almost surely, 2^648332724 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 648332724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (819314496).

648332724 is an abundant number, since it is smaller than the sum of its proper divisors (990296268).

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

648332724 is a wasteful number, since it uses less digits than its factorization.

648332724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24216 (or 24214 counting only the distinct ones).

The product of its digits is 193536, while the sum is 39.

The square root of 648332724 is about 25462.3786005943. The cubic root of 648332724 is about 865.4978251898.

The spelling of 648332724 in words is "six hundred forty-eight million, three hundred thirty-two thousand, seven hundred twenty-four".