408002403 has 4 divisors (see below), whose sum is σ = 544003208. Its totient is φ = 272001600.

The previous prime is 408002401. The next prime is 408002407. The reversal of 408002403 is 304200804.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 408002403 - 2¹ = 408002401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 408002403.

It is not an unprimeable number, because it can be changed into a prime (408002401) 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, 68000398 + ... + 68000403.

It is an arithmetic number, because the mean of its divisors is an integer number (136000802).

Almost surely, 2^408002403 is an apocalyptic number.

408002403 is a deficient number, since it is larger than the sum of its proper divisors (136000805).

408002403 is a wasteful number, since it uses less digits than its factorization.

408002403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136000804.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 408002403 is about 20199.0693597502. The cubic root of 408002403 is about 741.6874099544.

The spelling of 408002403 in words is "four hundred eight million, two thousand, four hundred three".