400044642000 has 80 divisors (see below), whose sum is σ = 1289743945152. Its totient is φ = 106678569600.

The previous prime is 400044641957. The next prime is 400044642029. The reversal of 400044642000 is 246440004.

It is a tau number, because it is divible by the number of its divisors (80).

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

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 15 ways as a sum of consecutive naturals, for example, 33331054 + ... + 33343053.

Almost surely, 2^400044642000 is an apocalyptic number.

400044642000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400044642000 is an abundant number, since it is smaller than the sum of its proper divisors (889699303152).

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

400044642000 is a wasteful number, since it uses less digits than its factorization.

400044642000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66674133 (or 66674117 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The spelling of 400044642000 in words is "four hundred billion, forty-four million, six hundred forty-two thousand".