7978630 has 16 divisors (see below), whose sum is σ = 15667344. Its totient is φ = 2901280.

The previous prime is 7978609. The next prime is 7978637. The reversal of 7978630 is 368797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36157 + ... + 36376.

It is an arithmetic number, because the mean of its divisors is an integer number (979209).

Almost surely, 2^7978630 is an apocalyptic number.

7978630 is a deficient number, since it is larger than the sum of its proper divisors (7688714).

7978630 is a wasteful number, since it uses less digits than its factorization.

7978630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72551.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 7978630 is about 2824.6468805853. The cubic root of 7978630 is about 199.8217578626.

The spelling of 7978630 in words is "seven million, nine hundred seventy-eight thousand, six hundred thirty".