2749169640 has 128 divisors (see below), whose sum is σ = 9471006720. Its totient is φ = 625363200.

The previous prime is 2749169639. The next prime is 2749169651. The reversal of 2749169640 is 469619472.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2749169640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169485 + ... + 184995.

It is an arithmetic number, because the mean of its divisors is an integer number (73992240).

Almost surely, 2^2749169640 is an apocalyptic number.

2749169640 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 2749169640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4735503360).

2749169640 is an abundant number, since it is smaller than the sum of its proper divisors (6721837080).

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

2749169640 is a wasteful number, since it uses less digits than its factorization.

2749169640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15743 (or 15739 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 2749169640 is about 52432.5246388156. The cubic root of 2749169640 is about 1400.8786389277.

The spelling of 2749169640 in words is "two billion, seven hundred forty-nine million, one hundred sixty-nine thousand, six hundred forty".