400016875 has 10 divisors (see below), whose sum is σ = 499861868. Its totient is φ = 320013000.

The previous prime is 400016857. The next prime is 400016887. The reversal of 400016875 is 578610004.

It is not a de Polignac number, because 400016875 - 2⁵ = 400016843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 319389 + ... + 320638.

Almost surely, 2^400016875 is an apocalyptic number.

400016875 is a deficient number, since it is larger than the sum of its proper divisors (99844993).

400016875 is an frugal number, since it uses more digits than its factorization.

400016875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640047 (or 640032 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 400016875 is about 20000.4218705506. The cubic root of 400016875 is about 736.8166609210.

Adding to 400016875 its reverse (578610004), we get a palindrome (978626879).

The spelling of 400016875 in words is "four hundred million, sixteen thousand, eight hundred seventy-five".