7999930 has 8 divisors (see below), whose sum is σ = 14399892. Its totient is φ = 3199968.

The previous prime is 7999921. The next prime is 7999963. The reversal of 7999930 is 399997.

It can be written as a sum of positive squares in 2 ways, for example, as 7678441 + 321489 = 2771^2 + 567^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 399987 + ... + 400006.

Almost surely, 2^7999930 is an apocalyptic number.

7999930 is a deficient number, since it is larger than the sum of its proper divisors (6399962).

7999930 is a wasteful number, since it uses less digits than its factorization.

7999930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800000.

The product of its (nonzero) digits is 137781, while the sum is 46.

The square root of 7999930 is about 2828.4147503505. The cubic root of 7999930 is about 199.9994166650. Note that the first 3 decimals are identical.

The spelling of 7999930 in words is "seven million, nine hundred ninety-nine thousand, nine hundred thirty".