206872406 has 8 divisors (see below), whose sum is σ = 334178544. Its totient is φ = 95479560.

The previous prime is 206872297. The next prime is 206872433. The reversal of 206872406 is 604278602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3978290 + ... + 3978341.

It is an arithmetic number, because the mean of its divisors is an integer number (41772318).

Almost surely, 2^206872406 is an apocalyptic number.

206872406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

206872406 is a deficient number, since it is larger than the sum of its proper divisors (127306138).

206872406 is a wasteful number, since it uses less digits than its factorization.

206872406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7956646.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 206872406 is about 14383.0596883973. The cubic root of 206872406 is about 591.4266023201.

The spelling of 206872406 in words is "two hundred six million, eight hundred seventy-two thousand, four hundred six".