206741840 has 40 divisors (see below), whose sum is σ = 487273128. Its totient is φ = 81561600.

The previous prime is 206741837. The next prime is 206741867. The reversal of 206741840 is 48147602.

It can be written as a sum of positive squares in 4 ways, for example, as 7706176 + 199035664 = 2776^2 + 14108^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 206741797 and 206741806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11861 + ... + 23540.

Almost surely, 2^206741840 is an apocalyptic number.

206741840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206741840 is an abundant number, since it is smaller than the sum of its proper divisors (280531288).

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

206741840 is a wasteful number, since it uses less digits than its factorization.

206741840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35487 (or 35481 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 206741840 is about 14378.5200907465. The cubic root of 206741840 is about 591.3021512819.

The spelling of 206741840 in words is "two hundred six million, seven hundred forty-one thousand, eight hundred forty".