206630856 has 24 divisors (see below), whose sum is σ = 559625430. Its totient is φ = 68876928.

The previous prime is 206630843. The next prime is 206630861. The reversal of 206630856 is 658036602.

206630856 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 206496900 + 133956 = 14370^2 + 366^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a self number, because there is not a number n which added to its sum of digits gives 206630856.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1434865 + ... + 1435008.

Almost surely, 2^206630856 is an apocalyptic number.

It is an amenable number.

206630856 is an abundant number, since it is smaller than the sum of its proper divisors (352994574).

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

206630856 is a wasteful number, since it uses less digits than its factorization.

206630856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869885 (or 2869878 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 206630856 is about 14374.6602046796. The cubic root of 206630856 is about 591.1963239298.

The spelling of 206630856 in words is "two hundred six million, six hundred thirty thousand, eight hundred fifty-six".