2499890 has 8 divisors (see below), whose sum is σ = 4499820. Its totient is φ = 999952.

The previous prime is 2499881. The next prime is 2499907. The reversal of 2499890 is 989942.

It can be written as a sum of positive squares in 2 ways, for example, as 2399401 + 100489 = 1549^2 + 317^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124985 + ... + 125004.

2^2499890 is an apocalyptic number.

2499890 is a deficient number, since it is larger than the sum of its proper divisors (1999930).

2499890 is a wasteful number, since it uses less digits than its factorization.

2499890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249996.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 2499890 is about 1581.1040446473. The cubic root of 2499890 is about 135.7188902276.

The spelling of 2499890 in words is "two million, four hundred ninety-nine thousand, eight hundred ninety".