2002638897 has 20 divisors (see below), whose sum is σ = 3418968256. Its totient is φ = 1144364760.

The previous prime is 2002638889. The next prime is 2002638901. The reversal of 2002638897 is 7988362002.

2002638897 is a `hidden beast` number, since 2 + 0 + 0 + 2 + 638 + 8 + 9 + 7 = 666.

It is not a de Polignac number, because 2002638897 - 2³ = 2002638889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002638887) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1765429 + ... + 1766562.

Almost surely, 2^2002638897 is an apocalyptic number.

2002638897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2002638897 is a deficient number, since it is larger than the sum of its proper divisors (1416329359).

2002638897 is an equidigital number, since it uses as much as digits as its factorization.

2002638897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3532010 (or 3532001 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 2002638897 is about 44750.8535896244. The cubic root of 2002638897 is about 1260.4749400029.

The spelling of 2002638897 in words is "two billion, two million, six hundred thirty-eight thousand, eight hundred ninety-seven".