2897985447 has 36 divisors (see below), whose sum is σ = 4916913456. Its totient is φ = 1611187200.

The previous prime is 2897985439. The next prime is 2897985511. The reversal of 2897985447 is 7445897982.

2897985447 is a `hidden beast` number, since 2 + 89 + 7 + 9 + 8 + 544 + 7 = 666.

It is not a de Polignac number, because 2897985447 - 2³ = 2897985439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2897985407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69447 + ... + 103047.

Almost surely, 2^2897985447 is an apocalyptic number.

2897985447 is a deficient number, since it is larger than the sum of its proper divisors (2018928009).

2897985447 is a wasteful number, since it uses less digits than its factorization.

2897985447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33688 (or 33648 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The square root of 2897985447 is about 53832.9401667789. The cubic root of 2897985447 is about 1425.7128592130.

The spelling of 2897985447 in words is "two billion, eight hundred ninety-seven million, nine hundred eighty-five thousand, four hundred forty-seven".