1447991768 has 8 divisors (see below), whose sum is σ = 2714984580. Its totient is φ = 723995880.

The previous prime is 1447991759. The next prime is 1447991791. The reversal of 1447991768 is 8671997441.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90499478 + ... + 90499493.

Almost surely, 2^1447991768 is an apocalyptic number.

It is an amenable number.

1447991768 is a deficient number, since it is larger than the sum of its proper divisors (1266992812).

1447991768 is a wasteful number, since it uses less digits than its factorization.

1447991768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180998977 (or 180998973 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 56.

The square root of 1447991768 is about 38052.4870146486. The cubic root of 1447991768 is about 1131.3284212578.

The spelling of 1447991768 in words is "one billion, four hundred forty-seven million, nine hundred ninety-one thousand, seven hundred sixty-eight".