400004257000 has 32 divisors (see below), whose sum is σ = 936009963720. Its totient is φ = 160001702400.

The previous prime is 400004256979. The next prime is 400004257007. The reversal of 400004257000 is 752400004.

It can be written as a sum of positive squares in 4 ways, for example, as 96140924356 + 303863332644 = 310066^2 + 551238^2 .

It is not an unprimeable number, because it can be changed into a prime (400004257007) by changing a digit.

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, 200001129 + ... + 200003128.

Almost surely, 2^400004257000 is an apocalyptic number.

400004257000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400004257000 is an abundant number, since it is smaller than the sum of its proper divisors (536005706720).

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

400004257000 is a wasteful number, since it uses less digits than its factorization.

400004257000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400004278 (or 400004264 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

Adding to 400004257000 its reverse (752400004), we get a palindrome (400756657004).

The spelling of 400004257000 in words is "four hundred billion, four million, two hundred fifty-seven thousand".