2489643 has 32 divisors (see below), whose sum is σ = 4092480. Its totient is φ = 1486080.

The previous prime is 2489639. The next prime is 2489647. The reversal of 2489643 is 3469842.

It is a happy number.

2489643 is a `hidden beast` number, since 2 + 4 + 8 + 9 + 643 = 666.

It is an interprime number because it is at equal distance from previous prime (2489639) and next prime (2489647).

It is not a de Polignac number, because 2489643 - 2² = 2489639 is a prime.

2489643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2489598 and 2489607.

It is not an unprimeable number, because it can be changed into a prime (2489647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14305 + ... + 14477.

It is an arithmetic number, because the mean of its divisors is an integer number (127890).

2^2489643 is an apocalyptic number.

2489643 is a deficient number, since it is larger than the sum of its proper divisors (1602837).

2489643 is a wasteful number, since it uses less digits than its factorization.

2489643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 230 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 2489643 is about 1577.8602599723. The cubic root of 2489643 is about 135.5331999275.

The spelling of 2489643 in words is "two million, four hundred eighty-nine thousand, six hundred forty-three".