648835890 has 32 divisors (see below), whose sum is σ = 1607440896. Its totient is φ = 167441280.

The previous prime is 648835867. The next prime is 648835897. The reversal of 648835890 is 98538846.

648835890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (648835897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347907 + ... + 349766.

It is an arithmetic number, because the mean of its divisors is an integer number (50232528).

Almost surely, 2^648835890 is an apocalyptic number.

648835890 is an abundant number, since it is smaller than the sum of its proper divisors (958605006).

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

648835890 is a wasteful number, since it uses less digits than its factorization.

648835890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697714.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The square root of 648835890 is about 25472.2572615777. The cubic root of 648835890 is about 865.7216693423.

The spelling of 648835890 in words is "six hundred forty-eight million, eight hundred thirty-five thousand, eight hundred ninety".