2749557920 has 48 divisors (see below), whose sum is σ = 6602343048. Its totient is φ = 1081789440.

The previous prime is 2749557919. The next prime is 2749557929. The reversal of 2749557920 is 297559472.

It can be written as a sum of positive squares in 4 ways, for example, as 2100938896 + 648619024 = 45836^2 + 25468^2 .

It is not an unprimeable number, because it can be changed into a prime (2749557929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131099 + ... + 150618.

Almost surely, 2^2749557920 is an apocalyptic number.

2749557920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2749557920 is an abundant number, since it is smaller than the sum of its proper divisors (3852785128).

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

2749557920 is a wasteful number, since it uses less digits than its factorization.

2749557920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281793 (or 281785 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 50.

The square root of 2749557920 is about 52436.2271716797. The cubic root of 2749557920 is about 1400.9445870289.

The spelling of 2749557920 in words is "two billion, seven hundred forty-nine million, five hundred fifty-seven thousand, nine hundred twenty".