673956648 has 24 divisors (see below), whose sum is σ = 1825299450. Its totient is φ = 224652192.

The previous prime is 673956643. The next prime is 673956671. The reversal of 673956648 is 846659376.

673956648 is a `hidden beast` number, since 6 + 7 + 39 + 566 + 48 = 666.

It can be written as a sum of positive squares in only one way, i.e., 666569124 + 7387524 = 25818^2 + 2718^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 673956594 and 673956603.

It is not an unprimeable number, because it can be changed into a prime (673956643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4680183 + ... + 4680326.

Almost surely, 2^673956648 is an apocalyptic number.

It is an amenable number.

673956648 is an abundant number, since it is smaller than the sum of its proper divisors (1151342802).

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

673956648 is a wasteful number, since it uses less digits than its factorization.

673956648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9360521 (or 9360514 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 673956648 is about 25960.6750297445. The cubic root of 673956648 is about 876.7531210229.

The spelling of 673956648 in words is "six hundred seventy-three million, nine hundred fifty-six thousand, six hundred forty-eight".