400006589 has 4 divisors (see below), whose sum is σ = 402079356. Its totient is φ = 397933824.

The previous prime is 400006573. The next prime is 400006603. The reversal of 400006589 is 985600004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49942489 + 350064100 = 7067^2 + 18710^2 .

It is a cyclic number.

It is not a de Polignac number, because 400006589 - 2⁴ = 400006573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400003589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036094 + ... + 1036479.

It is an arithmetic number, because the mean of its divisors is an integer number (100519839).

Almost surely, 2^400006589 is an apocalyptic number.

It is an amenable number.

400006589 is a deficient number, since it is larger than the sum of its proper divisors (2072767).

400006589 is a wasteful number, since it uses less digits than its factorization.

400006589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072766.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 400006589 is about 20000.1647243216. The cubic root of 400006589 is about 736.8103453865.

The spelling of 400006589 in words is "four hundred million, six thousand, five hundred eighty-nine".