401878686444 has 24 divisors (see below), whose sum is σ = 992876755248. Its totient is φ = 126079587840.

The previous prime is 401878686439. The next prime is 401878686479. The reversal of 401878686444 is 444686878104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984996577 + ... + 984996984.

It is an arithmetic number, because the mean of its divisors is an integer number (41369864802).

Almost surely, 2^401878686444 is an apocalyptic number.

It is an amenable number.

401878686444 is an abundant number, since it is smaller than the sum of its proper divisors (590998068804).

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

401878686444 is a wasteful number, since it uses less digits than its factorization.

401878686444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969993585 (or 1969993583 counting only the distinct ones).

The product of its (nonzero) digits is 33030144, while the sum is 60.

The spelling of 401878686444 in words is "four hundred one billion, eight hundred seventy-eight million, six hundred eighty-six thousand, four hundred forty-four".