7978922 has 16 divisors (see below), whose sum is σ = 13903872. Its totient is φ = 3363120.

The previous prime is 7978913. The next prime is 7978937. The reversal of 7978922 is 2298797.

It is a d-powerful number, because it can be written as 7⁷ + 9⁶ + 7⁸ + 8⁶ + 9⁶ + 2⁴ + 2¹⁶ .

It is a congruent number.

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, 3818 + ... + 5525.

It is an arithmetic number, because the mean of its divisors is an integer number (868992).

Almost surely, 2^7978922 is an apocalyptic number.

7978922 is a deficient number, since it is larger than the sum of its proper divisors (5924950).

7978922 is a wasteful number, since it uses less digits than its factorization.

7978922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9413.

The product of its digits is 127008, while the sum is 44.

The square root of 7978922 is about 2824.6985679892. The cubic root of 7978922 is about 199.8241955092.

The spelling of 7978922 in words is "seven million, nine hundred seventy-eight thousand, nine hundred twenty-two".