648930744 has 192 divisors, whose sum is σ = 2265043200. Its totient is φ = 168505920.

The previous prime is 648930721. The next prime is 648930761. The reversal of 648930744 is 447039846.

It is a super-2 number, since 2×648930744² = 842222221016787072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 648930744.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181179 + ... + 184725.

It is an arithmetic number, because the mean of its divisors is an integer number (11797100).

Almost surely, 2^648930744 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 648930744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132521600).

648930744 is an abundant number, since it is smaller than the sum of its proper divisors (1616112456).

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

648930744 is a wasteful number, since it uses less digits than its factorization.

648930744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591 (or 3570 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 648930744 is about 25474.1191015509. The cubic root of 648930744 is about 865.7638542066.

The spelling of 648930744 in words is "six hundred forty-eight million, nine hundred thirty thousand, seven hundred forty-four".