206678920 has 128 divisors (see below), whose sum is σ = 564019200. Its totient is φ = 66629376.

The previous prime is 206678917. The next prime is 206678957. The reversal of 206678920 is 29876602.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 431241 + ... + 431719.

It is an arithmetic number, because the mean of its divisors is an integer number (4406400).

Almost surely, 2^206678920 is an apocalyptic number.

206678920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206678920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282009600).

206678920 is an abundant number, since it is smaller than the sum of its proper divisors (357340280).

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

206678920 is a wasteful number, since it uses less digits than its factorization.

206678920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 206678920 is about 14376.3319382936. The cubic root of 206678920 is about 591.2421593836.

The spelling of 206678920 in words is "two hundred six million, six hundred seventy-eight thousand, nine hundred twenty".