400031112 has 48 divisors (see below), whose sum is σ = 1082935440. Its totient is φ = 123085248.

The previous prime is 400031083. The next prime is 400031119. The reversal of 400031112 is 211130004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (400031119) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 45258 + ... + 53369.

It is an arithmetic number, because the mean of its divisors is an integer number (22561155).

Almost surely, 2^400031112 is an apocalyptic number.

It is an amenable number.

400031112 is an abundant number, since it is smaller than the sum of its proper divisors (682904328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400031112 is a wasteful number, since it uses less digits than its factorization.

400031112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98662 (or 98645 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 400031112 is about 20000.7777848763. Note that the first 4 decimals coincide. The cubic root of 400031112 is about 736.8254021642.

Adding to 400031112 its reverse (211130004), we get a palindrome (611161116).

The spelling of 400031112 in words is "four hundred million, thirty-one thousand, one hundred twelve".