7828290 has 24 divisors (see below), whose sum is σ = 20353788. Its totient is φ = 2087520.

The previous prime is 7828283. The next prime is 7828291. The reversal of 7828290 is 928287.

It can be written as a sum of positive squares in 2 ways, for example, as 7177041 + 651249 = 2679^2 + 807^2 .

It is a super-2 number, since 2×7828290² = 122564248648200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7828291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43401 + ... + 43580.

Almost surely, 2^7828290 is an apocalyptic number.

7828290 is an abundant number, since it is smaller than the sum of its proper divisors (12525498).

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

7828290 is a wasteful number, since it uses less digits than its factorization.

7828290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86994 (or 86991 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 7828290 is about 2797.9081471700. The cubic root of 7828290 is about 198.5587218696.

It can be divided in two parts, 7828 and 290, that added together give a palindrome (8118).

The spelling of 7828290 in words is "seven million, eight hundred twenty-eight thousand, two hundred ninety".