206672740 has 24 divisors (see below), whose sum is σ = 459543672. Its totient is φ = 77806080.

The previous prime is 206672731. The next prime is 206672743. The reversal of 206672740 is 47276602.

206672740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5089536 + 201583204 = 2256^2 + 14198^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 206672696 and 206672705.

It is not an unprimeable number, because it can be changed into a prime (206672743) 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, 303591 + ... + 304270.

It is an arithmetic number, because the mean of its divisors is an integer number (19147653).

Almost surely, 2^206672740 is an apocalyptic number.

206672740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206672740 is an abundant number, since it is smaller than the sum of its proper divisors (252870932).

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

206672740 is a wasteful number, since it uses less digits than its factorization.

206672740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607887 (or 607885 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 206672740 is about 14376.1170000804. The cubic root of 206672740 is about 591.2362663250.

The spelling of 206672740 in words is "two hundred six million, six hundred seventy-two thousand, seven hundred forty".