206780508 has 72 divisors (see below), whose sum is σ = 575383536. Its totient is φ = 62092800.

The previous prime is 206780501. The next prime is 206780533. The reversal of 206780508 is 805087602.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206780501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42438 + ... + 47058.

It is an arithmetic number, because the mean of its divisors is an integer number (7991438).

Almost surely, 2^206780508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206780508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287691768).

206780508 is an abundant number, since it is smaller than the sum of its proper divisors (368603028).

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

206780508 is a wasteful number, since it uses less digits than its factorization.

206780508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755 (or 4750 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 206780508 is about 14379.8646725204. The cubic root of 206780508 is about 591.3390137545.

The spelling of 206780508 in words is "two hundred six million, seven hundred eighty thousand, five hundred eight".