7828287 has 8 divisors (see below), whose sum is σ = 10451760. Its totient is φ = 5211840.

The previous prime is 7828283. The next prime is 7828291.

7828287 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (7828283) and next prime (7828291).

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

It is not a de Polignac number, because 7828287 - 2² = 7828283 is a prime.

It is a super-2 number, since 2×7828287² = 122564154708738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7828283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987 + ... + 4427.

It is an arithmetic number, because the mean of its divisors is an integer number (1306470).

Almost surely, 2^7828287 is an apocalyptic number.

7828287 is a deficient number, since it is larger than the sum of its proper divisors (2623473).

7828287 is a wasteful number, since it uses less digits than its factorization.

7828287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513.

The product of its digits is 100352, while the sum is 42.

The square root of 7828287 is about 2797.9076110551. The cubic root of 7828287 is about 198.5586965053.

The spelling of 7828287 in words is "seven million, eight hundred twenty-eight thousand, two hundred eighty-seven".