2639768120 has 64 divisors (see below), whose sum is σ = 6488143200. Its totient is φ = 958625280.

The previous prime is 2639768101. The next prime is 2639768129. The reversal of 2639768120 is 218679362.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639768129) 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 15 ways as a sum of consecutive naturals, for example, 361142 + ... + 368378.

Almost surely, 2^2639768120 is an apocalyptic number.

2639768120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2639768120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3244071600).

2639768120 is an abundant number, since it is smaller than the sum of its proper divisors (3848375080).

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

2639768120 is a wasteful number, since it uses less digits than its factorization.

2639768120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088 (or 8084 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 2639768120 is about 51378.6737859202. The cubic root of 2639768120 is about 1382.0441804503.

The spelling of 2639768120 in words is "two billion, six hundred thirty-nine million, seven hundred sixty-eight thousand, one hundred twenty".