2639770860 has 48 divisors (see below), whose sum is σ = 7563257856. Its totient is φ = 687567552.

The previous prime is 2639770853. The next prime is 2639770873. The reversal of 2639770860 is 680779362.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 509004 + ... + 514163.

It is an arithmetic number, because the mean of its divisors is an integer number (157567872).

Almost surely, 2^2639770860 is an apocalyptic number.

2639770860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2639770860 is an abundant number, since it is smaller than the sum of its proper divisors (4923486996).

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

2639770860 is a wasteful number, since it uses less digits than its factorization.

2639770860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023222 (or 1023220 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 48.

The square root of 2639770860 is about 51378.7004506731. The cubic root of 2639770860 is about 1382.0446586236.

The spelling of 2639770860 in words is "two billion, six hundred thirty-nine million, seven hundred seventy thousand, eight hundred sixty".