2897928647 has 16 divisors (see below), whose sum is σ = 3177600192. Its totient is φ = 2632081920.

The previous prime is 2897928643. The next prime is 2897928721. The reversal of 2897928647 is 7468297982.

It is a cyclic number.

It is not a de Polignac number, because 2897928647 - 2² = 2897928643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2897928647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2897928643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28598 + ... + 81324.

It is an arithmetic number, because the mean of its divisors is an integer number (198600012).

Almost surely, 2^2897928647 is an apocalyptic number.

2897928647 is a deficient number, since it is larger than the sum of its proper divisors (279671545).

2897928647 is a wasteful number, since it uses less digits than its factorization.

2897928647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52858.

The product of its digits is 24385536, while the sum is 62.

The square root of 2897928647 is about 53832.4126061614. The cubic root of 2897928647 is about 1425.7035445793.

The spelling of 2897928647 in words is "two billion, eight hundred ninety-seven million, nine hundred twenty-eight thousand, six hundred forty-seven".