401186839 has 8 divisors (see below), whose sum is σ = 409471200. Its totient is φ = 392929056.

The previous prime is 401186837. The next prime is 401186867. The reversal of 401186839 is 938681104.

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

It is a 5-Lehmer number, since φ(401186839) divides (401186839-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 401186839 - 2¹ = 401186837 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 (401186831) 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, 25429 + ... + 38065.

It is an arithmetic number, because the mean of its divisors is an integer number (51183900).

Almost surely, 2^401186839 is an apocalyptic number.

401186839 is a deficient number, since it is larger than the sum of its proper divisors (8284361).

401186839 is a wasteful number, since it uses less digits than its factorization.

401186839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13289.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 401186839 is about 20029.6489984223. The cubic root of 401186839 is about 737.5343055573.

The spelling of 401186839 in words is "four hundred one million, one hundred eighty-six thousand, eight hundred thirty-nine".