401439959 has 8 divisors (see below), whose sum is σ = 411050640. Its totient is φ = 391841856.

The previous prime is 401439943. The next prime is 401439971. The reversal of 401439959 is 959934104.

It is a happy number.

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 401439959 - 2⁴ = 401439943 is a prime.

It is a super-2 number, since 2×401439959² = 322308081363843362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401432959) 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, 104627 + ... + 108395.

It is an arithmetic number, because the mean of its divisors is an integer number (51381330).

Almost surely, 2^401439959 is an apocalyptic number.

401439959 is a deficient number, since it is larger than the sum of its proper divisors (9610681).

401439959 is a wasteful number, since it uses less digits than its factorization.

401439959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6289.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 401439959 is about 20035.9666350291. The cubic root of 401439959 is about 737.6893832896.

The spelling of 401439959 in words is "four hundred one million, four hundred thirty-nine thousand, nine hundred fifty-nine".