206055390 has 32 divisors (see below), whose sum is σ = 516036096. Its totient is φ = 52558880.

The previous prime is 206055383. The next prime is 206055397. The reversal of 206055390 is 93550602.

206055390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (206055383) and next prime (206055397).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206055397) 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, 148626 + ... + 150005.

It is an arithmetic number, because the mean of its divisors is an integer number (16126128).

Almost surely, 2^206055390 is an apocalyptic number.

206055390 is an abundant number, since it is smaller than the sum of its proper divisors (309980706).

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

206055390 is a wasteful number, since it uses less digits than its factorization.

206055390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298664.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 206055390 is about 14354.6295667983. The cubic root of 206055390 is about 590.6469872837.

The spelling of 206055390 in words is "two hundred six million, fifty-five thousand, three hundred ninety".