7944428715 has 8 divisors (see below), whose sum is σ = 12711085968. Its totient is φ = 4237028640.

The previous prime is 7944428711. The next prime is 7944428741. The reversal of 7944428715 is 5178244497.

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

It is not a de Polignac number, because 7944428715 - 2² = 7944428711 is a prime.

It is a super-2 number, since 2×7944428715² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7944428711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264814276 + ... + 264814305.

It is an arithmetic number, because the mean of its divisors is an integer number (1588885746).

Almost surely, 2^7944428715 is an apocalyptic number.

7944428715 is a deficient number, since it is larger than the sum of its proper divisors (4766657253).

7944428715 is a wasteful number, since it uses less digits than its factorization.

7944428715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529628589.

The product of its digits is 2257920, while the sum is 51.

The square root of 7944428715 is about 89131.5248102488. The cubic root of 7944428715 is about 1995.3582952056.

The spelling of 7944428715 in words is "seven billion, nine hundred forty-four million, four hundred twenty-eight thousand, seven hundred fifteen".