7895197890 has 24 divisors (see below), whose sum is σ = 20527514748. Its totient is φ = 2105386080.

The previous prime is 7895197859. The next prime is 7895197897. The reversal of 7895197890 is 987915987.

It can be written as a sum of positive squares in 2 ways, for example, as 7255462041 + 639735849 = 85179^2 + 25293^2 .

It is not an unprimeable number, because it can be changed into a prime (7895197897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43862121 + ... + 43862300.

Almost surely, 2^7895197890 is an apocalyptic number.

7895197890 is an abundant number, since it is smaller than the sum of its proper divisors (12632316858).

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

7895197890 is a wasteful number, since it uses less digits than its factorization.

7895197890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87724434 (or 87724431 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 63.

The square root of 7895197890 is about 88854.9260874151. The cubic root of 7895197890 is about 1991.2280737357.

The spelling of 7895197890 in words is "seven billion, eight hundred ninety-five million, one hundred ninety-seven thousand, eight hundred ninety".