7978955 has 16 divisors (see below), whose sum is σ = 10298880. Its totient is φ = 5915232.

The previous prime is 7978937. The next prime is 7978961. The reversal of 7978955 is 5598797.

It is not a de Polignac number, because 7978955 - 2⁸ = 7978699 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3572 + ... + 5358.

It is an arithmetic number, because the mean of its divisors is an integer number (643680).

Almost surely, 2^7978955 is an apocalyptic number.

7978955 is a deficient number, since it is larger than the sum of its proper divisors (2319925).

7978955 is a wasteful number, since it uses less digits than its factorization.

7978955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858.

The product of its digits is 793800, while the sum is 50.

The square root of 7978955 is about 2824.7044093144. The cubic root of 7978955 is about 199.8244709929.

The spelling of 7978955 in words is "seven million, nine hundred seventy-eight thousand, nine hundred fifty-five".