403280405 has 16 divisors (see below), whose sum is σ = 531304704. Its totient is φ = 291420480.

The previous prime is 403280369. The next prime is 403280417. The reversal of 403280405 is 504082304.

It is not a de Polignac number, because 403280405 - 2²⁰ = 402231829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14717 + ... + 31986.

It is an arithmetic number, because the mean of its divisors is an integer number (33206544).

Almost surely, 2^403280405 is an apocalyptic number.

It is an amenable number.

403280405 is a deficient number, since it is larger than the sum of its proper divisors (128024299).

403280405 is a wasteful number, since it uses less digits than its factorization.

403280405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46876.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 403280405 is about 20081.8426694365. The cubic root of 403280405 is about 738.8150044484.

It can be divided in two parts, 403280 and 405, that multiplied together give a square (163328400 = 12780²).

The spelling of 403280405 in words is "four hundred three million, two hundred eighty thousand, four hundred five".