400985390605 has 8 divisors (see below), whose sum is σ = 485679501792. Its totient is φ = 317790290448.

The previous prime is 400985390599. The next prime is 400985390621. The reversal of 400985390605 is 506093589004.

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 400985390605 - 2¹⁷ = 400985259533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374752167 + ... + 374753236.

It is an arithmetic number, because the mean of its divisors is an integer number (60709937724).

Almost surely, 2^400985390605 is an apocalyptic number.

It is an amenable number.

400985390605 is a deficient number, since it is larger than the sum of its proper divisors (84694111187).

400985390605 is a wasteful number, since it uses less digits than its factorization.

400985390605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749505515.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 400985390605 in words is "four hundred billion, nine hundred eighty-five million, three hundred ninety thousand, six hundred five".