648258890 has 16 divisors (see below), whose sum is σ = 1167246720. Its totient is φ = 259218960.

The previous prime is 648258889. The next prime is 648258893. The reversal of 648258890 is 98852846.

It is not an unprimeable number, because it can be changed into a prime (648258893) 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, 28475 + ... + 45905.

It is an arithmetic number, because the mean of its divisors is an integer number (72952920).

Almost surely, 2^648258890 is an apocalyptic number.

648258890 is a deficient number, since it is larger than the sum of its proper divisors (518987830).

648258890 is a wasteful number, since it uses less digits than its factorization.

648258890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21157.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The square root of 648258890 is about 25460.9286947668. The cubic root of 648258890 is about 865.4649688132.

The spelling of 648258890 in words is "six hundred forty-eight million, two hundred fifty-eight thousand, eight hundred ninety".