2749940280 has 80 divisors (see below), whose sum is σ = 9242865720. Its totient is φ = 733316544.

The previous prime is 2749940279. The next prime is 2749940287. The reversal of 2749940280 is 820499472.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2749940287) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 421134 + ... + 427613.

Almost surely, 2^2749940280 is an apocalyptic number.

2749940280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2749940280 is an abundant number, since it is smaller than the sum of its proper divisors (6492925440).

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

2749940280 is a wasteful number, since it uses less digits than its factorization.

2749940280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848770 (or 848757 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 2749940280 is about 52439.8729975579. The cubic root of 2749940280 is about 1401.0095235701.

The spelling of 2749940280 in words is "two billion, seven hundred forty-nine million, nine hundred forty thousand, two hundred eighty".