206620398 has 24 divisors (see below), whose sum is σ = 447958368. Its totient is φ = 68830272.

The previous prime is 206620373. The next prime is 206620399. The reversal of 206620398 is 893026602.

206620398 is a `hidden beast` number, since 20 + 6 + 620 + 3 + 9 + 8 = 666.

206620398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206620399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40486 + ... + 45302.

It is an arithmetic number, because the mean of its divisors is an integer number (18664932).

Almost surely, 2^206620398 is an apocalyptic number.

206620398 is an abundant number, since it is smaller than the sum of its proper divisors (241337970).

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

206620398 is a wasteful number, since it uses less digits than its factorization.

206620398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7208 (or 7205 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 206620398 is about 14374.2964349564. The cubic root of 206620398 is about 591.1863498862.

The spelling of 206620398 in words is "two hundred six million, six hundred twenty thousand, three hundred ninety-eight".