7128238 has 8 divisors (see below), whose sum is σ = 11514888. Its totient is φ = 3289944.

The previous prime is 7128227. The next prime is 7128259. The reversal of 7128238 is 8328217.

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

It is an Ulam number.

It is a congruent 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, 137056 + ... + 137107.

It is an arithmetic number, because the mean of its divisors is an integer number (1439361).

Almost surely, 2^7128238 is an apocalyptic number.

7128238 is a deficient number, since it is larger than the sum of its proper divisors (4386650).

7128238 is a wasteful number, since it uses less digits than its factorization.

7128238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274178.

The product of its digits is 5376, while the sum is 31.

The square root of 7128238 is about 2669.8760270844. The cubic root of 7128238 is about 192.4542017321.

The spelling of 7128238 in words is "seven million, one hundred twenty-eight thousand, two hundred thirty-eight".