7872238 has 8 divisors (see below), whose sum is σ = 12881880. Its totient is φ = 3578280.

The previous prime is 7872223. The next prime is 7872239. The reversal of 7872238 is 8322787.

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

It is a super-2 number, since 2×7872238² = 123944262257288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7872197 and 7872206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7872239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178893 + ... + 178936.

It is an arithmetic number, because the mean of its divisors is an integer number (1610235).

Almost surely, 2^7872238 is an apocalyptic number.

7872238 is a deficient number, since it is larger than the sum of its proper divisors (5009642).

7872238 is a wasteful number, since it uses less digits than its factorization.

7872238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357842.

The product of its digits is 37632, while the sum is 37.

The square root of 7872238 is about 2805.7508798894. The cubic root of 7872238 is about 198.9295980856.

It can be divided in two parts, 787 and 2238, that added together give a square (3025 = 55²).

The spelling of 7872238 in words is "seven million, eight hundred seventy-two thousand, two hundred thirty-eight".