400044112 has 20 divisors (see below), whose sum is σ = 834707860. Its totient is φ = 184635648.

The previous prime is 400044103. The next prime is 400044121. The reversal of 400044112 is 211440004.

It is an interprime number because it is at equal distance from previous prime (400044103) and next prime (400044121).

It can be written as a sum of positive squares in 2 ways, for example, as 137733696 + 262310416 = 11736^2 + 16196^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961437 + ... + 961852.

It is an arithmetic number, because the mean of its divisors is an integer number (41735393).

Almost surely, 2^400044112 is an apocalyptic number.

It is an amenable number.

400044112 is an abundant number, since it is smaller than the sum of its proper divisors (434663748).

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

400044112 is a wasteful number, since it uses less digits than its factorization.

400044112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923310 (or 1923304 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 400044112 is about 20001.1027695975. The cubic root of 400044112 is about 736.8333837321.

Adding to 400044112 its reverse (211440004), we get a palindrome (611484116).

The spelling of 400044112 in words is "four hundred million, forty-four thousand, one hundred twelve".