647089890 has 32 divisors (see below), whose sum is σ = 1586062080. Its totient is φ = 168885504.

The previous prime is 647089841. The next prime is 647089903. The reversal of 647089890 is 98980746.

It is a happy number.

647089890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228055 + ... + 230874.

It is an arithmetic number, because the mean of its divisors is an integer number (49564440).

Almost surely, 2^647089890 is an apocalyptic number.

647089890 is an abundant number, since it is smaller than the sum of its proper divisors (938972190).

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

647089890 is a wasteful number, since it uses less digits than its factorization.

647089890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458986.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 647089890 is about 25437.9615928635. The cubic root of 647089890 is about 864.9444271380.

The spelling of 647089890 in words is "six hundred forty-seven million, eighty-nine thousand, eight hundred ninety".