400000444 has 12 divisors (see below), whose sum is σ = 701502984. Its totient is φ = 199571024.

The previous prime is 400000411. The next prime is 400000457. The reversal of 400000444 is 444000004.

400000444 is a modest number, since divided by 444 gives 400 as remainder.

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, 105199 + ... + 108934.

It is an arithmetic number, because the mean of its divisors is an integer number (58458582).

Almost surely, 2^400000444 is an apocalyptic number.

It is an amenable number.

400000444 is a deficient number, since it is larger than the sum of its proper divisors (301502540).

400000444 is a wasteful number, since it uses less digits than its factorization.

400000444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214604 (or 214602 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 400000444 is about 20000.0110999969. The cubic root of 400000444 is about 736.8065723463.

Adding to 400000444 its reverse (444000004), we get a palindrome (844000448).

The spelling of 400000444 in words is "four hundred million, four hundred forty-four", and thus it is an aban number.