400111172 has 24 divisors (see below), whose sum is σ = 723969792. Its totient is φ = 193284000.

The previous prime is 400111171. The next prime is 400111183. The reversal of 400111172 is 271111004.

It is a self number, because there is not a number n which added to its sum of digits gives 400111172.

It is not an unprimeable number, because it can be changed into a prime (400111171) 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, 84623 + ... + 89225.

It is an arithmetic number, because the mean of its divisors is an integer number (30165408).

Almost surely, 2^400111172 is an apocalyptic number.

It is an amenable number.

400111172 is a deficient number, since it is larger than the sum of its proper divisors (323858620).

400111172 is a wasteful number, since it uses less digits than its factorization.

400111172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339 (or 5337 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 400111172 is about 20002.7791069141. The cubic root of 400111172 is about 736.8745535968.

Adding to 400111172 its reverse (271111004), we get a palindrome (671222176).

The spelling of 400111172 in words is "four hundred million, one hundred eleven thousand, one hundred seventy-two".