400238044000 has 48 divisors (see below), whose sum is σ = 983384883936. Its totient is φ = 160095216000.

The previous prime is 400238043991. The next prime is 400238044039. The reversal of 400238044000 is 440832004.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50025756 + ... + 50033755.

It is an arithmetic number, because the mean of its divisors is an integer number (20487185082).

Almost surely, 2^400238044000 is an apocalyptic number.

400238044000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400238044000 is an abundant number, since it is smaller than the sum of its proper divisors (583146839936).

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

400238044000 is a wasteful number, since it uses less digits than its factorization.

400238044000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100059536 (or 100059518 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 400238044000 its reverse (440832004), we get a palindrome (400678876004).

The spelling of 400238044000 in words is "four hundred billion, two hundred thirty-eight million, forty-four thousand".