28571377397444 has 24 divisors (see below), whose sum is σ = 57145260466560. Its totient is φ = 12244339097856.

The previous prime is 28571377397333. The next prime is 28571377397533. The reversal of 28571377397444 is 44479377317582.

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, 21721784 + ... + 22999535.

It is an arithmetic number, because the mean of its divisors is an integer number (2381052519440).

Almost surely, 2^{28571377397444} is an apocalyptic number.

It is an amenable number.

28571377397444 is an abundant number, since it is smaller than the sum of its proper divisors (28573883069116).

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

28571377397444 is a wasteful number, since it uses less digits than its factorization.

28571377397444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44744147 (or 44744145 counting only the distinct ones).

The product of its digits is 995742720, while the sum is 71.

The spelling of 28571377397444 in words is "twenty-eight trillion, five hundred seventy-one billion, three hundred seventy-seven million, three hundred ninety-seven thousand, four hundred forty-four".