7828064891 has 8 divisors (see below), whose sum is σ = 7929270720. Its totient is φ = 7726912128.

The previous prime is 7828064879. The next prime is 7828064921. The reversal of 7828064891 is 1984608287.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7828064891 is a prime.

It is a super-2 number, since 2×7828064891² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7828064291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345875 + ... + 367811.

It is an arithmetic number, because the mean of its divisors is an integer number (991158840).

Almost surely, 2^7828064891 is an apocalyptic number.

7828064891 is a deficient number, since it is larger than the sum of its proper divisors (101205829).

7828064891 is a wasteful number, since it uses less digits than its factorization.

7828064891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26533.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The square root of 7828064891 is about 88476.3521569464. The cubic root of 7828064891 is about 1985.5681861088.

The spelling of 7828064891 in words is "seven billion, eight hundred twenty-eight million, sixty-four thousand, eight hundred ninety-one".