648024040 has 32 divisors (see below), whose sum is σ = 1462411080. Its totient is φ = 258435072.

The previous prime is 648024023. The next prime is 648024107. The reversal of 648024040 is 40420846.

It can be written as a sum of positive squares in 4 ways, for example, as 535367044 + 112656996 = 23138^2 + 10614^2 .

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 7 ways as a sum of consecutive naturals, for example, 10557 + ... + 37516.

Almost surely, 2^648024040 is an apocalyptic number.

It is an amenable number.

648024040 is an abundant number, since it is smaller than the sum of its proper divisors (814387040).

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

648024040 is a wasteful number, since it uses less digits than its factorization.

648024040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48421 (or 48417 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 648024040 is about 25456.3163085314. The cubic root of 648024040 is about 865.3604431878.

Adding to 648024040 its reverse (40420846), we get a palindrome (688444886).

The spelling of 648024040 in words is "six hundred forty-eight million, twenty-four thousand, forty".