400430555 has 16 divisors (see below), whose sum is σ = 550629120. Its totient is φ = 273847392.

The previous prime is 400430549. The next prime is 400430561. The reversal of 400430555 is 555034004.

400430555 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (400430549) and next prime (400430561).

It is not a de Polignac number, because 400430555 - 2¹⁰ = 400429531 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1829 + ... + 28358.

It is an arithmetic number, because the mean of its divisors is an integer number (34414320).

Almost surely, 2^400430555 is an apocalyptic number.

400430555 is a deficient number, since it is larger than the sum of its proper divisors (150198565).

400430555 is a wasteful number, since it uses less digits than its factorization.

400430555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30578.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 400430555 is about 20010.7609800327. The cubic root of 400430555 is about 737.0705679627.

Adding to 400430555 its reverse (555034004), we get a palindrome (955464559).

The spelling of 400430555 in words is "four hundred million, four hundred thirty thousand, five hundred fifty-five".