206237140 has 24 divisors (see below), whose sum is σ = 434651112. Its totient is φ = 82199040.

The previous prime is 206237137. The next prime is 206237147. The reversal of 206237140 is 41732602.

It can be written as a sum of positive squares in 4 ways, for example, as 13749264 + 192487876 = 3708^2 + 13874^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206237147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12729 + ... + 23968.

It is an arithmetic number, because the mean of its divisors is an integer number (18110463).

Almost surely, 2^206237140 is an apocalyptic number.

206237140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206237140 is an abundant number, since it is smaller than the sum of its proper divisors (228413972).

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

206237140 is a wasteful number, since it uses less digits than its factorization.

206237140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36987 (or 36985 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 206237140 is about 14360.9588816346. The cubic root of 206237140 is about 590.8205952035.

Adding to 206237140 its reverse (41732602), we get a palindrome (247969742).

The spelling of 206237140 in words is "two hundred six million, two hundred thirty-seven thousand, one hundred forty".