401002004 has 72 divisors (see below), whose sum is σ = 800841888. Its totient is φ = 174545280.

The previous prime is 401001949. The next prime is 401002009. The reversal of 401002004 is 400200104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401002009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3061019 + ... + 3061149.

It is an arithmetic number, because the mean of its divisors is an integer number (11122804).

Almost surely, 2^401002004 is an apocalyptic number.

It is an amenable number.

401002004 is a deficient number, since it is larger than the sum of its proper divisors (399839884).

401002004 is a wasteful number, since it uses less digits than its factorization.

401002004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 401002004 is about 20025.0344319304. The cubic root of 401002004 is about 737.4210224342.

Adding to 401002004 its reverse (400200104), we get a palindrome (801202108).

The spelling of 401002004 in words is "four hundred one million, two thousand, four".