401961867 has 16 divisors (see below), whose sum is σ = 548225280. Its totient is φ = 261889952.

The previous prime is 401961851. The next prime is 401961899. The reversal of 401961867 is 768169104.

It is a cyclic number.

It is not a de Polignac number, because 401961867 - 2⁴ = 401961851 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (401961817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24058 + ... + 37184.

It is an arithmetic number, because the mean of its divisors is an integer number (34264080).

Almost surely, 2^401961867 is an apocalyptic number.

401961867 is a deficient number, since it is larger than the sum of its proper divisors (146263413).

401961867 is a wasteful number, since it uses less digits than its factorization.

401961867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13362.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 401961867 is about 20048.9866826231. The cubic root of 401961867 is about 738.0089323322.

The spelling of 401961867 in words is "four hundred one million, nine hundred sixty-one thousand, eight hundred sixty-seven".