400444382 has 32 divisors (see below), whose sum is σ = 661936800. Its totient is φ = 180558720.

The previous prime is 400444381. The next prime is 400444403. The reversal of 400444382 is 283444004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257744 + ... + 259292.

It is an arithmetic number, because the mean of its divisors is an integer number (20685525).

Almost surely, 2^400444382 is an apocalyptic number.

400444382 is a deficient number, since it is larger than the sum of its proper divisors (261492418).

400444382 is a wasteful number, since it uses less digits than its factorization.

400444382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788.

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 400444382 is about 20011.1064661602. The cubic root of 400444382 is about 737.0790516289.

Adding to 400444382 its reverse (283444004), we get a palindrome (683888386).

The spelling of 400444382 in words is "four hundred million, four hundred forty-four thousand, three hundred eighty-two".