2639763240 has 32 divisors (see below), whose sum is σ = 7919290080. Its totient is φ = 703936832.

The previous prime is 2639763221. The next prime is 2639763241. The reversal of 2639763240 is 423679362.

It is a junction number, because it is equal to n+sod(n) for n = 2639763192 and 2639763201.

It is not an unprimeable number, because it can be changed into a prime (2639763241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10998894 + ... + 10999133.

It is an arithmetic number, because the mean of its divisors is an integer number (247477815).

Almost surely, 2^2639763240 is an apocalyptic number.

2639763240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2639763240 is an abundant number, since it is smaller than the sum of its proper divisors (5279526840).

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

2639763240 is a wasteful number, since it uses less digits than its factorization.

2639763240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21998041 (or 21998037 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 42.

The square root of 2639763240 is about 51378.6262953770. The cubic root of 2639763240 is about 1382.0433288124.

The spelling of 2639763240 in words is "two billion, six hundred thirty-nine million, seven hundred sixty-three thousand, two hundred forty".