7966820 has 12 divisors (see below), whose sum is σ = 16730364. Its totient is φ = 3186720.

The previous prime is 7966817. The next prime is 7966831. The reversal of 7966820 is 286697.

It can be written as a sum of positive squares in 2 ways, for example, as 3020644 + 4946176 = 1738^2 + 2224^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199151 + ... + 199190.

It is an arithmetic number, because the mean of its divisors is an integer number (1394197).

Almost surely, 2^7966820 is an apocalyptic number.

It is an amenable number.

7966820 is an abundant number, since it is smaller than the sum of its proper divisors (8763544).

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

7966820 is a wasteful number, since it uses less digits than its factorization.

7966820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398350 (or 398348 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 7966820 is about 2822.5555796122. Note that the first 4 decimals coincide. The cubic root of 7966820 is about 199.7231168555.

The spelling of 7966820 in words is "seven million, nine hundred sixty-six thousand, eight hundred twenty".