400378411993 has 8 divisors (see below), whose sum is σ = 462105777600. Its totient is φ = 339783658800.

The previous prime is 400378411891. The next prime is 400378412003. The reversal of 400378411993 is 399114873004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400378411993 - 2²⁹ = 399841541081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400378411193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283152343 + ... + 283153756.

It is an arithmetic number, because the mean of its divisors is an integer number (57763222200).

Almost surely, 2^400378411993 is an apocalyptic number.

It is an amenable number.

400378411993 is a deficient number, since it is larger than the sum of its proper divisors (61727365607).

400378411993 is a wasteful number, since it uses less digits than its factorization.

400378411993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566306207.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 400378411993 in words is "four hundred billion, three hundred seventy-eight million, four hundred eleven thousand, nine hundred ninety-three".