400544232000 has 224 divisors, whose sum is σ = 1442834100864. Its totient is φ = 97101568000.

The previous prime is 400544231993. The next prime is 400544232013. The reversal of 400544232000 is 232445004.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 31 ways as a sum of consecutive naturals, for example, 494607 + ... + 1022606.

Almost surely, 2^400544232000 is an apocalyptic number.

400544232000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400544232000 is an abundant number, since it is smaller than the sum of its proper divisors (1042289868864).

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

400544232000 is a wasteful number, since it uses less digits than its factorization.

400544232000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517254 (or 1517234 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

Adding to 400544232000 its reverse (232445004), we get a palindrome (400776677004).

The spelling of 400544232000 in words is "four hundred billion, five hundred forty-four million, two hundred thirty-two thousand".