7720458078 has 16 divisors (see below), whose sum is σ = 15447895056. Its totient is φ = 2572322880.

The previous prime is 7720458071. The next prime is 7720458103. The reversal of 7720458078 is 8708540277.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720458071) 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, 276351 + ... + 303002.

It is an arithmetic number, because the mean of its divisors is an integer number (965493441).

Almost surely, 2^7720458078 is an apocalyptic number.

7720458078 is an abundant number, since it is smaller than the sum of its proper divisors (7727436978).

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

7720458078 is a wasteful number, since it uses less digits than its factorization.

7720458078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581579.

The product of its (nonzero) digits is 878080, while the sum is 48.

The square root of 7720458078 is about 87866.1372657294. The cubic root of 7720458078 is about 1976.4281143822.

The spelling of 7720458078 in words is "seven billion, seven hundred twenty million, four hundred fifty-eight thousand, seventy-eight".