400500355 has 4 divisors (see below), whose sum is σ = 480600432. Its totient is φ = 320400280.

The previous prime is 400500343. The next prime is 400500361. The reversal of 400500355 is 553005004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 400500355 - 2¹³ = 400492163 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 40050031 + ... + 40050040.

It is an arithmetic number, because the mean of its divisors is an integer number (120150108).

Almost surely, 2^400500355 is an apocalyptic number.

400500355 is a deficient number, since it is larger than the sum of its proper divisors (80100077).

400500355 is an equidigital number, since it uses as much as digits as its factorization.

400500355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80100076.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 400500355 is about 20012.5049656459. The cubic root of 400500355 is about 737.1133923143.

Adding to 400500355 its reverse (553005004), we get a palindrome (953505359).

The spelling of 400500355 in words is "four hundred million, five hundred thousand, three hundred fifty-five".