401767865 has 8 divisors (see below), whose sum is σ = 482390088. Its totient is φ = 321235200.

The previous prime is 401767859. The next prime is 401767871. The reversal of 401767865 is 568767104.

It is an interprime number because it is at equal distance from previous prime (401767859) and next prime (401767871).

It can be written as a sum of positive squares in 4 ways, for example, as 10163344 + 391604521 = 3188^2 + 19789^2 .

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

It is not a de Polignac number, because 401767865 - 2⁶ = 401767801 is a prime.

It is a super-2 number, since 2×401767865² = 322834834693316450, which contains 22 as substring.

It is a Duffinian number.

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, 12086 + ... + 30815.

It is an arithmetic number, because the mean of its divisors is an integer number (60298761).

Almost surely, 2^401767865 is an apocalyptic number.

It is an amenable number.

401767865 is a deficient number, since it is larger than the sum of its proper divisors (80622223).

401767865 is a wasteful number, since it uses less digits than its factorization.

401767865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44779.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 401767865 is about 20044.1478990752. The cubic root of 401767865 is about 737.8901828846.

The spelling of 401767865 in words is "four hundred one million, seven hundred sixty-seven thousand, eight hundred sixty-five".