3998403 has 10 divisors (see below), whose sum is σ = 5973044. Its totient is φ = 2665548.

The previous prime is 3998399. The next prime is 3998413. The reversal of 3998403 is 3048993.

It is not a de Polignac number, because 3998403 - 2² = 3998399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3998413) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24601 + ... + 24762.

Almost surely, 2^3998403 is an apocalyptic number.

3998403 is a deficient number, since it is larger than the sum of its proper divisors (1974641).

3998403 is an equidigital number, since it uses as much as digits as its factorization.

3998403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49375 (or 49366 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3998403 is about 1999.6007101419. The cubic root of 3998403 is about 158.7189767224.

The spelling of 3998403 in words is "three million, nine hundred ninety-eight thousand, four hundred three".