2643838902 has 24 divisors (see below), whose sum is σ = 5729631336. Its totient is φ = 881077536.

The previous prime is 2643838867. The next prime is 2643838903. The reversal of 2643838902 is 2098383462.

2643838902 is a `hidden beast` number, since 264 + 3 + 8 + 389 + 0 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643838903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78378 + ... + 106914.

It is an arithmetic number, because the mean of its divisors is an integer number (238734639).

Almost surely, 2^2643838902 is an apocalyptic number.

2643838902 is an abundant number, since it is smaller than the sum of its proper divisors (3085792434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2643838902 is a wasteful number, since it uses less digits than its factorization.

2643838902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33692 (or 33689 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 2643838902 is about 51418.2740083718. The cubic root of 2643838902 is about 1382.7542315917.

The spelling of 2643838902 in words is "two billion, six hundred forty-three million, eight hundred thirty-eight thousand, nine hundred two".