7928049205 has 4 divisors (see below), whose sum is σ = 9513659052. Its totient is φ = 6342439360.

The previous prime is 7928049197. The next prime is 7928049209. The reversal of 7928049205 is 5029408297.

7928049205 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5029408297 = 331 ⋅15194587.

It can be written as a sum of positive squares in 2 ways, for example, as 3963206116 + 3964843089 = 62954^2 + 62967^2 .

It is not a de Polignac number, because 7928049205 - 2³ = 7928049197 is a prime.

It is a super-2 number, since 2×7928049205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7928049209) 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 3 ways as a sum of consecutive naturals, for example, 792804916 + ... + 792804925.

It is an arithmetic number, because the mean of its divisors is an integer number (2378414763).

Almost surely, 2^7928049205 is an apocalyptic number.

It is an amenable number.

7928049205 is a deficient number, since it is larger than the sum of its proper divisors (1585609847).

7928049205 is a wasteful number, since it uses less digits than its factorization.

7928049205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585609846.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 7928049205 is about 89039.5934682993. The cubic root of 7928049205 is about 1993.9860346531.

The spelling of 7928049205 in words is "seven billion, nine hundred twenty-eight million, forty-nine thousand, two hundred five".