206897004 has 144 divisors (see below), whose sum is σ = 605404800. Its totient is φ = 61399296.

The previous prime is 206896997. The next prime is 206897017. The reversal of 206897004 is 400798602.

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 206897004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 313627 + ... + 314285.

It is an arithmetic number, because the mean of its divisors is an integer number (4204200).

Almost surely, 2^206897004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206897004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302702400).

206897004 is an abundant number, since it is smaller than the sum of its proper divisors (398507796).

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

206897004 is a wasteful number, since it uses less digits than its factorization.

206897004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 206897004 is about 14383.9147661546. The cubic root of 206897004 is about 591.4500424287.

The spelling of 206897004 in words is "two hundred six million, eight hundred ninety-seven thousand, four".