7872438 has 24 divisors (see below), whose sum is σ = 18316152. Its totient is φ = 2249184.

The previous prime is 7872437. The next prime is 7872439. The reversal of 7872438 is 8342787.

It is an interprime number because it is at equal distance from previous prime (7872437) and next prime (7872439).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7872396 and 7872405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7872437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13095 + ... + 13682.

It is an arithmetic number, because the mean of its divisors is an integer number (763173).

Almost surely, 2^7872438 is an apocalyptic number.

7872438 is an abundant number, since it is smaller than the sum of its proper divisors (10443714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7872438 is a wasteful number, since it uses less digits than its factorization.

7872438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26796 (or 26789 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 7872438 is about 2805.7865207460. The cubic root of 7872438 is about 198.9312827223.

The spelling of 7872438 in words is "seven million, eight hundred seventy-two thousand, four hundred thirty-eight".