400234403 has 8 divisors (see below), whose sum is σ = 403635648. Its totient is φ = 396840384.

The previous prime is 400234357. The next prime is 400234421. The reversal of 400234403 is 304432004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400234403 - 2¹⁸ = 399972259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400234433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193925 + ... + 195977.

It is an arithmetic number, because the mean of its divisors is an integer number (50454456).

Almost surely, 2^400234403 is an apocalyptic number.

400234403 is a deficient number, since it is larger than the sum of its proper divisors (3401245).

400234403 is a wasteful number, since it uses less digits than its factorization.

400234403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 400234403 is about 20005.8592167395. The cubic root of 400234403 is about 736.9501962961.

Adding to 400234403 its reverse (304432004), we get a palindrome (704666407).

The spelling of 400234403 in words is "four hundred million, two hundred thirty-four thousand, four hundred three".