7828231 has 4 divisors (see below), whose sum is σ = 8098200. Its totient is φ = 7558264.

The previous prime is 7828217. The next prime is 7828237. The reversal of 7828231 is 1328287.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7828231 - 2⁵ = 7828199 is a prime.

It is a super-2 number, since 2×7828231² = 122562401178722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7828193 and 7828202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7828237) 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, 134941 + ... + 134998.

It is an arithmetic number, because the mean of its divisors is an integer number (2024550).

Almost surely, 2^7828231 is an apocalyptic number.

7828231 is a deficient number, since it is larger than the sum of its proper divisors (269969).

7828231 is a wasteful number, since it uses less digits than its factorization.

7828231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269968.

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

The square root of 7828231 is about 2797.8976035588. The cubic root of 7828231 is about 198.5582230381.

The spelling of 7828231 in words is "seven million, eight hundred twenty-eight thousand, two hundred thirty-one".