7859138890 has 16 divisors (see below), whose sum is σ = 14150556000. Its totient is φ = 3142743120.

The previous prime is 7859138869. The next prime is 7859138971. The reversal of 7859138890 is 988319587.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77316 + ... + 147295.

It is an arithmetic number, because the mean of its divisors is an integer number (884409750).

Almost surely, 2^7859138890 is an apocalyptic number.

7859138890 is a deficient number, since it is larger than the sum of its proper divisors (6291417110).

7859138890 is a wasteful number, since it uses less digits than its factorization.

7859138890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228117.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The square root of 7859138890 is about 88651.7844716055. The cubic root of 7859138890 is about 1988.1919968961.

The spelling of 7859138890 in words is "seven billion, eight hundred fifty-nine million, one hundred thirty-eight thousand, eight hundred ninety".