648956844 has 72 divisors (see below), whose sum is σ = 1741940928. Its totient is φ = 203005440.

The previous prime is 648956843. The next prime is 648956849. The reversal of 648956844 is 448659846.

It is a super-2 number, since 2×648956844² = 842289970748880672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648956843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241629 + ... + 244299.

It is an arithmetic number, because the mean of its divisors is an integer number (24193624).

Almost surely, 2^648956844 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 648956844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870970464).

648956844 is an abundant number, since it is smaller than the sum of its proper divisors (1092984084).

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

648956844 is a wasteful number, since it uses less digits than its factorization.

648956844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095 (or 3090 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The square root of 648956844 is about 25474.6313810426. The cubic root of 648956844 is about 865.7754610608.

The spelling of 648956844 in words is "six hundred forty-eight million, nine hundred fifty-six thousand, eight hundred forty-four".