401139985 has 8 divisors (see below), whose sum is σ = 482328000. Its totient is φ = 320271984.

The previous prime is 401139979. The next prime is 401140001. The reversal of 401139985 is 589931104.

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 401139985 - 2⁷ = 401139857 is a prime.

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, 77235 + ... + 82264.

It is an arithmetic number, because the mean of its divisors is an integer number (60291000).

Almost surely, 2^401139985 is an apocalyptic number.

It is an amenable number.

401139985 is a deficient number, since it is larger than the sum of its proper divisors (81188015).

401139985 is a wasteful number, since it uses less digits than its factorization.

401139985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160007.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 401139985 is about 20028.4793481682. The cubic root of 401139985 is about 737.5055926034.

The spelling of 401139985 in words is "four hundred one million, one hundred thirty-nine thousand, nine hundred eighty-five".