401028003 has 36 divisors (see below), whose sum is σ = 633366760. Its totient is φ = 253202112.

The previous prime is 401027999. The next prime is 401028007. The reversal of 401028003 is 300820104.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (401027999) and next prime (401028007).

It is not a de Polignac number, because 401028003 - 2² = 401027999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401028007) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 123051 + ... + 126267.

Almost surely, 2^401028003 is an apocalyptic number.

401028003 is a deficient number, since it is larger than the sum of its proper divisors (232338757).

401028003 is an frugal number, since it uses more digits than its factorization.

401028003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260 (or 3239 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 401028003 is about 20025.6835838380. The cubic root of 401028003 is about 737.4369590087.

Adding to 401028003 its reverse (300820104), we get a palindrome (701848107).

The spelling of 401028003 in words is "four hundred one million, twenty-eight thousand, three".