403978263 has 8 divisors (see below), whose sum is σ = 580071408. Its totient is φ = 248601984.

The previous prime is 403978261. The next prime is 403978273. The reversal of 403978263 is 362879304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 403978263 - 2¹ = 403978261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403978261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5179170 + ... + 5179247.

It is an arithmetic number, because the mean of its divisors is an integer number (72508926).

Almost surely, 2^403978263 is an apocalyptic number.

403978263 is a deficient number, since it is larger than the sum of its proper divisors (176093145).

403978263 is a wasteful number, since it uses less digits than its factorization.

403978263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10358433.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 403978263 is about 20099.2105068831. The cubic root of 403978263 is about 739.2409205441.

The spelling of 403978263 in words is "four hundred three million, nine hundred seventy-eight thousand, two hundred sixty-three".