2749949880 has 128 divisors (see below), whose sum is σ = 8430739200. Its totient is φ = 717366272.

The previous prime is 2749949863. The next prime is 2749949963. The reversal of 2749949880 is 889499472.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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, 1648807 + ... + 1650473.

It is an arithmetic number, because the mean of its divisors is an integer number (65865150).

Almost surely, 2^2749949880 is an apocalyptic number.

2749949880 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 2749949880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4215369600).

2749949880 is an abundant number, since it is smaller than the sum of its proper divisors (5680789320).

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

2749949880 is a wasteful number, since it uses less digits than its factorization.

2749949880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1969 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The square root of 2749949880 is about 52439.9645308805. The cubic root of 2749949880 is about 1401.0111538692.

The spelling of 2749949880 in words is "two billion, seven hundred forty-nine million, nine hundred forty-nine thousand, eight hundred eighty".