7978512 has 20 divisors (see below), whose sum is σ = 20611280. Its totient is φ = 2659488.

The previous prime is 7978471. The next prime is 7978519. The reversal of 7978512 is 2158797.

7978512 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (7978519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83062 + ... + 83157.

It is an arithmetic number, because the mean of its divisors is an integer number (1030564).

Almost surely, 2^7978512 is an apocalyptic number.

It is an amenable number.

7978512 is an abundant number, since it is smaller than the sum of its proper divisors (12632768).

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

7978512 is a wasteful number, since it uses less digits than its factorization.

7978512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166230 (or 166224 counting only the distinct ones).

The product of its digits is 35280, while the sum is 39.

The square root of 7978512 is about 2824.6259929414. The cubic root of 7978512 is about 199.8207727693.

It can be divided in two parts, 79785 and 12, that added together give a palindrome (79797).

The spelling of 7978512 in words is "seven million, nine hundred seventy-eight thousand, five hundred twelve".