206240090 has 64 divisors (see below), whose sum is σ = 455735808. Its totient is φ = 65587200.

The previous prime is 206240087. The next prime is 206240101. The reversal of 206240090 is 90042602.

206240090 is digitally balanced in base 3, 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 31 ways as a sum of consecutive naturals, for example, 83270 + ... + 85710.

It is an arithmetic number, because the mean of its divisors is an integer number (7120872).

Almost surely, 2^206240090 is an apocalyptic number.

206240090 is an abundant number, since it is smaller than the sum of its proper divisors (249495718).

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

206240090 is a wasteful number, since it uses less digits than its factorization.

206240090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 206240090 is about 14361.0615902864. The cubic root of 206240090 is about 590.8234122074.

Adding to 206240090 its reverse (90042602), we get a palindrome (296282692).

The spelling of 206240090 in words is "two hundred six million, two hundred forty thousand, ninety".