401001646 has 8 divisors (see below), whose sum is σ = 603207504. Its totient is φ = 199932480.

The previous prime is 401001641. The next prime is 401001649. The reversal of 401001646 is 646100104.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401001641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283290 + ... + 284701.

It is an arithmetic number, because the mean of its divisors is an integer number (75400938).

Almost surely, 2^401001646 is an apocalyptic number.

401001646 is a deficient number, since it is larger than the sum of its proper divisors (202205858).

401001646 is a wasteful number, since it uses less digits than its factorization.

401001646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568346.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 401001646 is about 20025.0254931174. The cubic root of 401001646 is about 737.4208029866.

The spelling of 401001646 in words is "four hundred one million, one thousand, six hundred forty-six".