2649890 has 16 divisors (see below), whose sum is σ = 4798008. Its totient is φ = 1053696.

The previous prime is 2649887. The next prime is 2649893. The reversal of 2649890 is 989462.

It is an interprime number because it is at equal distance from previous prime (2649887) and next prime (2649893).

It can be written as a sum of positive squares in 4 ways, for example, as 2474329 + 175561 = 1573^2 + 419^2 .

It is not an unprimeable number, because it can be changed into a prime (2649893) 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, 1244 + ... + 2616.

2^2649890 is an apocalyptic number.

2649890 is a deficient number, since it is larger than the sum of its proper divisors (2148118).

2649890 is a wasteful number, since it uses less digits than its factorization.

2649890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2649890 is about 1627.8482730279. The cubic root of 2649890 is about 138.3808356081.

The spelling of 2649890 in words is "two million, six hundred forty-nine thousand, eight hundred ninety".