206648090 has 64 divisors (see below), whose sum is σ = 437166720. Its totient is φ = 69488640.

The previous prime is 206648089. The next prime is 206648111. The reversal of 206648090 is 90846602.

It is a self number, because there is not a number n which added to its sum of digits gives 206648090.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109394 + ... + 111266.

It is an arithmetic number, because the mean of its divisors is an integer number (6830730).

Almost surely, 2^206648090 is an apocalyptic number.

206648090 is an abundant number, since it is smaller than the sum of its proper divisors (230518630).

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

206648090 is a wasteful number, since it uses less digits than its factorization.

206648090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 206648090 is about 14375.2596498289. The cubic root of 206648090 is about 591.2127596716.

The spelling of 206648090 in words is "two hundred six million, six hundred forty-eight thousand, ninety".