206434004 has 24 divisors (see below), whose sum is σ = 419639808. Its totient is φ = 87020640.

The previous prime is 206434003. The next prime is 206434061. The reversal of 206434004 is 400434602.

It is a happy number.

It is a super-2 number, since 2×206434004² = 85229996014944032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206434003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58724 + ... + 62139.

It is an arithmetic number, because the mean of its divisors is an integer number (17484992).

Almost surely, 2^206434004 is an apocalyptic number.

It is an amenable number.

206434004 is an abundant number, since it is smaller than the sum of its proper divisors (213205804).

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

206434004 is a wasteful number, since it uses less digits than its factorization.

206434004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120935 (or 120933 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 206434004 is about 14367.8113851762. The cubic root of 206434004 is about 591.0085250091.

Adding to 206434004 its reverse (400434602), we get a palindrome (606868606).

The spelling of 206434004 in words is "two hundred six million, four hundred thirty-four thousand, four".