400395403 has 12 divisors (see below), whose sum is σ = 415021320. Its totient is φ = 386223936.

The previous prime is 400395383. The next prime is 400395419. The reversal of 400395403 is 304593004.

It is a de Polignac number, because none of the positive numbers 2^k-400395403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400395433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152163 + ... + 154771.

It is an arithmetic number, because the mean of its divisors is an integer number (34585110).

Almost surely, 2^400395403 is an apocalyptic number.

400395403 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

400395403 is a deficient number, since it is larger than the sum of its proper divisors (14625917).

400395403 is an equidigital number, since it uses as much as digits as its factorization.

400395403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 400395403 is about 20009.8826333390. The cubic root of 400395403 is about 737.0489992933.

The spelling of 400395403 in words is "four hundred million, three hundred ninety-five thousand, four hundred three".