400532403 has 8 divisors (see below), whose sum is σ = 547068816. Its totient is φ = 260508800.

The previous prime is 400532389. The next prime is 400532411. The reversal of 400532403 is 304235004.

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 400532403 - 2⁶ = 400532339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400532403.

It is not an unprimeable number, because it can be changed into a prime (400532443) 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, 1628058 + ... + 1628303.

It is an arithmetic number, because the mean of its divisors is an integer number (68383602).

Almost surely, 2^400532403 is an apocalyptic number.

400532403 is a deficient number, since it is larger than the sum of its proper divisors (146536413).

400532403 is a wasteful number, since it uses less digits than its factorization.

400532403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256405.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 400532403 is about 20013.3056489926. The cubic root of 400532403 is about 737.1330530376.

Adding to 400532403 its reverse (304235004), we get a palindrome (704767407).

The spelling of 400532403 in words is "four hundred million, five hundred thirty-two thousand, four hundred three".