648437250 has 32 divisors (see below), whose sum is σ = 1618501248. Its totient is φ = 172916400.

The previous prime is 648437243. The next prime is 648437281. The reversal of 648437250 is 52734846.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 648437199 and 648437208.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 431542 + ... + 433041.

It is an arithmetic number, because the mean of its divisors is an integer number (50578164).

Almost surely, 2^648437250 is an apocalyptic number.

648437250 is an abundant number, since it is smaller than the sum of its proper divisors (970063998).

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

648437250 is a wasteful number, since it uses less digits than its factorization.

648437250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864603 (or 864593 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The square root of 648437250 is about 25464.4310755218. The cubic root of 648437250 is about 865.5443353437.

It can be divided in two parts, 6484 and 37250, that added together give a palindrome (43734).

The spelling of 648437250 in words is "six hundred forty-eight million, four hundred thirty-seven thousand, two hundred fifty".