648736726 has 8 divisors (see below), whose sum is σ = 1061569224. Its totient is φ = 294880320.

The previous prime is 648736709. The next prime is 648736733. The reversal of 648736726 is 627637846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×648736726² = 841718679322398152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 648736726.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14743995 + ... + 14744038.

It is an arithmetic number, because the mean of its divisors is an integer number (132696153).

Almost surely, 2^648736726 is an apocalyptic number.

648736726 is a deficient number, since it is larger than the sum of its proper divisors (412832498).

648736726 is a wasteful number, since it uses less digits than its factorization.

648736726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29488046.

The product of its digits is 2032128, while the sum is 49.

The square root of 648736726 is about 25470.3106773357. The cubic root of 648736726 is about 865.6775632754.

The spelling of 648736726 in words is "six hundred forty-eight million, seven hundred thirty-six thousand, seven hundred twenty-six".