648135858 has 32 divisors (see below), whose sum is σ = 1320629760. Its totient is φ = 212002560.

The previous prime is 648135833. The next prime is 648135871. The reversal of 648135858 is 858531846.

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, 173466 + ... + 177162.

It is an arithmetic number, because the mean of its divisors is an integer number (41269680).

Almost surely, 2^648135858 is an apocalyptic number.

648135858 is an abundant number, since it is smaller than the sum of its proper divisors (672493902).

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

648135858 is a wasteful number, since it uses less digits than its factorization.

648135858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242.

The product of its digits is 921600, while the sum is 48.

The square root of 648135858 is about 25458.5124860036. The cubic root of 648135858 is about 865.4102136197.

The spelling of 648135858 in words is "six hundred forty-eight million, one hundred thirty-five thousand, eight hundred fifty-eight".