648742287 has 24 divisors (see below), whose sum is σ = 923863696. Its totient is φ = 404840448.

The previous prime is 648742279. The next prime is 648742319. The reversal of 648742287 is 782247846.

It is a happy number.

648742287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648742287 - 2³ = 648742279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648747287) 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, 165393 + ... + 169269.

Almost surely, 2^648742287 is an apocalyptic number.

648742287 is a deficient number, since it is larger than the sum of its proper divisors (275121409).

648742287 is a wasteful number, since it uses less digits than its factorization.

648742287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107 (or 4090 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 48.

The square root of 648742287 is about 25470.4198434184. The cubic root of 648742287 is about 865.6800368105.

It can be divided in two parts, 64874 and 2287, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 648742287 in words is "six hundred forty-eight million, seven hundred forty-two thousand, two hundred eighty-seven".