2509438 has 16 divisors (see below), whose sum is σ = 4160160. Its totient is φ = 1129216.

The previous prime is 2509433. The next prime is 2509483. The reversal of 2509438 is 8349052.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2509433) 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, 823 + ... + 2386.

It is an arithmetic number, because the mean of its divisors is an integer number (260010).

2^2509438 is an apocalyptic number.

2509438 is a deficient number, since it is larger than the sum of its proper divisors (1650722).

2509438 is a wasteful number, since it uses less digits than its factorization.

2509438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2509438 is about 1584.1205762189. The cubic root of 2509438 is about 135.8914575122.

The spelling of 2509438 in words is "two million, five hundred nine thousand, four hundred thirty-eight".