206465490 has 128 divisors (see below), whose sum is σ = 686499840. Its totient is φ = 42897600.

The previous prime is 206465443. The next prime is 206465491. The reversal of 206465490 is 94564602.

206465490 is a `hidden beast` number, since 2 + 0 + 646 + 5 + 4 + 9 + 0 = 666.

206465490 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 (206465491) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15825 + ... + 25755.

It is an arithmetic number, because the mean of its divisors is an integer number (5363280).

Almost surely, 2^206465490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206465490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343249920).

206465490 is an abundant number, since it is smaller than the sum of its proper divisors (480034350).

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

206465490 is a wasteful number, since it uses less digits than its factorization.

206465490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9965 (or 9959 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 206465490 is about 14368.9070565579. The cubic root of 206465490 is about 591.0385710094.

The spelling of 206465490 in words is "two hundred six million, four hundred sixty-five thousand, four hundred ninety".