2749830 has 32 divisors (see below), whose sum is σ = 6697728. Its totient is φ = 722400.

The previous prime is 2749823. The next prime is 2749847. The reversal of 2749830 is 389472.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2749791 and 2749800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1485 + ... + 2775.

It is an arithmetic number, because the mean of its divisors is an integer number (209304).

2^2749830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2749830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3348864).

2749830 is an abundant number, since it is smaller than the sum of its proper divisors (3947898).

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

2749830 is a wasteful number, since it uses less digits than its factorization.

2749830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 2749830 is about 1658.2611374569. The cubic root of 2749830 is about 140.0990795237.

The spelling of 2749830 in words is "two million, seven hundred forty-nine thousand, eight hundred thirty".