7800428393 has 8 divisors (see below), whose sum is σ = 8482501512. Its totient is φ = 7143158016.

The previous prime is 7800428369. The next prime is 7800428401. The reversal of 7800428393 is 3938240087.

It can be written as a sum of positive squares in 4 ways, for example, as 6335682409 + 1464745984 = 79597^2 + 38272^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7800428393 - 2¹² = 7800424297 is a prime.

It is a super-2 number, since 2×7800428393² (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 (7800428303) 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, 6200030 + ... + 6201287.

It is an arithmetic number, because the mean of its divisors is an integer number (1060312689).

Almost surely, 2^7800428393 is an apocalyptic number.

It is an amenable number.

7800428393 is a deficient number, since it is larger than the sum of its proper divisors (682073119).

7800428393 is a wasteful number, since it uses less digits than its factorization.

7800428393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12401371.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 7800428393 is about 88320.0339277562. The cubic root of 7800428393 is about 1983.2287891006.

The spelling of 7800428393 in words is "seven billion, eight hundred million, four hundred twenty-eight thousand, three hundred ninety-three".