400433868672 has 32 divisors (see below), whose sum is σ = 1063652464680. Its totient is φ = 133477956096.

The previous prime is 400433868647. The next prime is 400433868677. The reversal of 400433868672 is 276868334004.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400433868677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521397883 + ... + 521398650.

Almost surely, 2^400433868672 is an apocalyptic number.

It is an amenable number.

400433868672 is an abundant number, since it is smaller than the sum of its proper divisors (663218596008).

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

400433868672 is a wasteful number, since it uses less digits than its factorization.

400433868672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042796550 (or 1042796538 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 51.

The spelling of 400433868672 in words is "four hundred billion, four hundred thirty-three million, eight hundred sixty-eight thousand, six hundred seventy-two".