6402738080 has 24 divisors (see below), whose sum is σ = 15126469092. Its totient is φ = 2561095168.

The previous prime is 6402738071. The next prime is 6402738107. The reversal of 6402738080 is 808372046.

It can be written as a sum of positive squares in 2 ways, for example, as 6234049936 + 168688144 = 78956^2 + 12988^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20008397 + ... + 20008716.

Almost surely, 2^6402738080 is an apocalyptic number.

It is an amenable number.

6402738080 is an abundant number, since it is smaller than the sum of its proper divisors (8723731012).

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

6402738080 is a wasteful number, since it uses less digits than its factorization.

6402738080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40017128 (or 40017120 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 6402738080 is about 80017.1111700491. Note that the first 4 decimals coincide. The cubic root of 6402738080 is about 1856.9002673945.

The spelling of 6402738080 in words is "six billion, four hundred two million, seven hundred thirty-eight thousand, eighty".