4000690205 has 8 divisors (see below), whose sum is σ = 4805481912. Its totient is φ = 3197449728.

The previous prime is 4000690193. The next prime is 4000690237. The reversal of 4000690205 is 5020960004.

It can be written as a sum of positive squares in 4 ways, for example, as 2698490809 + 1302199396 = 51947^2 + 36086^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4000690205 - 2⁸ = 4000689949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382124 + ... + 392453.

It is an arithmetic number, because the mean of its divisors is an integer number (600685239).

Almost surely, 2^4000690205 is an apocalyptic number.

It is an amenable number.

4000690205 is a deficient number, since it is larger than the sum of its proper divisors (804791707).

4000690205 is a wasteful number, since it uses less digits than its factorization.

4000690205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775615.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 4000690205 is about 63251.0095176354. The cubic root of 4000690205 is about 1587.4923493958.

The spelling of 4000690205 in words is "four billion, six hundred ninety thousand, two hundred five".