648238507 has 8 divisors (see below), whose sum is σ = 741495776. Its totient is φ = 555144192.

The previous prime is 648238499. The next prime is 648238511. The reversal of 648238507 is 705832846.

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

It is a cyclic number.

It is not a de Polignac number, because 648238507 - 2³ = 648238499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648238517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32088 + ... + 48229.

It is an arithmetic number, because the mean of its divisors is an integer number (92686972).

Almost surely, 2^648238507 is an apocalyptic number.

648238507 is a deficient number, since it is larger than the sum of its proper divisors (93257269).

648238507 is a wasteful number, since it uses less digits than its factorization.

648238507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81477.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 648238507 is about 25460.5284116414. The cubic root of 648238507 is about 865.4558978707.

The spelling of 648238507 in words is "six hundred forty-eight million, two hundred thirty-eight thousand, five hundred seven".