1447891478 has 16 divisors (see below), whose sum is σ = 2370297600. Its totient is φ = 657849000.

The previous prime is 1447891463. The next prime is 1447891481. The reversal of 1447891478 is 8741987441.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43223 + ... + 69021.

It is an arithmetic number, because the mean of its divisors is an integer number (148143600).

Almost surely, 2^1447891478 is an apocalyptic number.

1447891478 is a deficient number, since it is larger than the sum of its proper divisors (922406122).

1447891478 is a wasteful number, since it uses less digits than its factorization.

1447891478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28363.

The product of its digits is 1806336, while the sum is 53.

The square root of 1447891478 is about 38051.1692067405. The cubic root of 1447891478 is about 1131.3023015083.

The spelling of 1447891478 in words is "one billion, four hundred forty-seven million, eight hundred ninety-one thousand, four hundred seventy-eight".