7928641026 has 12 divisors (see below), whose sum is σ = 17178722262. Its totient is φ = 2642880336.

The previous prime is 7928641013. The next prime is 7928641027. The reversal of 7928641026 is 6201468297.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6233260401 + 1695380625 = 78951^2 + 41175^2 .

It is not an unprimeable number, because it can be changed into a prime (7928641027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 220240011 + ... + 220240046.

Almost surely, 2^7928641026 is an apocalyptic number.

7928641026 is an abundant number, since it is smaller than the sum of its proper divisors (9250081236).

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

7928641026 is a wasteful number, since it uses less digits than its factorization.

7928641026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440480065 (or 440480062 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 7928641026 is about 89042.9167648949. The cubic root of 7928641026 is about 1994.0356497776.

The spelling of 7928641026 in words is "seven billion, nine hundred twenty-eight million, six hundred forty-one thousand, twenty-six".