7206106640 has 40 divisors (see below), whose sum is σ = 16760724120. Its totient is φ = 2881319936.

The previous prime is 7206106631. The next prime is 7206106657. The reversal of 7206106640 is 466016027.

It can be written as a sum of positive squares in 4 ways, for example, as 2921618704 + 4284487936 = 54052^2 + 65456^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 7206106597 and 7206106606.

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, 206972 + ... + 239268.

It is an arithmetic number, because the mean of its divisors is an integer number (419018103).

Almost surely, 2^7206106640 is an apocalyptic number.

It is an amenable number.

7206106640 is an abundant number, since it is smaller than the sum of its proper divisors (9554617480).

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

7206106640 is a wasteful number, since it uses less digits than its factorization.

7206106640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35099 (or 35093 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 7206106640 is about 84888.7898370568. The cubic root of 7206106640 is about 1931.5245312505.

The spelling of 7206106640 in words is "seven billion, two hundred six million, one hundred six thousand, six hundred forty".