2749869 has 20 divisors (see below), whose sum is σ = 4351644. Its totient is φ = 1724544.

The previous prime is 2749849. The next prime is 2749883. The reversal of 2749869 is 9689472.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 927369 + 1822500 = 963^2 + 1350^2 .

It is not a de Polignac number, because 2749869 - 2¹⁶ = 2684333 is a prime.

It is a super-2 number, since 2×2749869² = 15123559034322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2749849) 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, 379 + ... + 2375.

2^2749869 is an apocalyptic number.

It is an amenable number.

2749869 is a deficient number, since it is larger than the sum of its proper divisors (1601775).

2749869 is a wasteful number, since it uses less digits than its factorization.

2749869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 2017 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 2749869 is about 1658.2728967212. The cubic root of 2749869 is about 140.0997418480.

The spelling of 2749869 in words is "two million, seven hundred forty-nine thousand, eight hundred sixty-nine".