2491630 has 16 divisors (see below), whose sum is σ = 4511664. Its totient is φ = 990720.

The previous prime is 2491609. The next prime is 2491649. The reversal of 2491630 is 361942.

It is a junction number, because it is equal to n+sod(n) for n = 2491595 and 2491604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285 + ... + 2575.

It is an arithmetic number, because the mean of its divisors is an integer number (281979).

2^2491630 is an apocalyptic number.

2491630 is a deficient number, since it is larger than the sum of its proper divisors (2020034).

2491630 is a wasteful number, since it uses less digits than its factorization.

2491630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2491630 is about 1578.4897845726. The cubic root of 2491630 is about 135.5692469772.

The spelling of 2491630 in words is "two million, four hundred ninety-one thousand, six hundred thirty".