648759436 has 24 divisors (see below), whose sum is σ = 1275823584. Its totient is φ = 286408320.

The previous prime is 648759431. The next prime is 648759437. The reversal of 648759436 is 634957846.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (648759431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270025 + ... + 272416.

It is an arithmetic number, because the mean of its divisors is an integer number (53159316).

Almost surely, 2^648759436 is an apocalyptic number.

It is an amenable number.

648759436 is a deficient number, since it is larger than the sum of its proper divisors (627064148).

648759436 is a wasteful number, since it uses less digits than its factorization.

648759436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542481 (or 542479 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The square root of 648759436 is about 25470.7564866064. The cubic root of 648759436 is about 865.6876646038.

The spelling of 648759436 in words is "six hundred forty-eight million, seven hundred fifty-nine thousand, four hundred thirty-six".