209012406 has 32 divisors (see below), whose sum is σ = 425956320. Its totient is φ = 68361216.

The previous prime is 209012389. The next prime is 209012459. The reversal of 209012406 is 604210902.

209012406 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71730 + ... + 74586.

It is an arithmetic number, because the mean of its divisors is an integer number (13311135).

Almost surely, 2^209012406 is an apocalyptic number.

209012406 is an abundant number, since it is smaller than the sum of its proper divisors (216943914).

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

209012406 is a wasteful number, since it uses less digits than its factorization.

209012406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 209012406 is about 14457.2613589158. The cubic root of 209012406 is about 593.4589559227.

The spelling of 209012406 in words is "two hundred nine million, twelve thousand, four hundred six".