7975878 has 8 divisors (see below), whose sum is σ = 15951768. Its totient is φ = 2658624.

The previous prime is 7975861. The next prime is 7975883. The reversal of 7975878 is 8785797.

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

7975878 is an admirable number.

It is a super-2 number, since 2×7975878² = 127229259741768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7975878.

It is a congruent number.

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, 664651 + ... + 664662.

It is an arithmetic number, because the mean of its divisors is an integer number (1993971).

Almost surely, 2^7975878 is an apocalyptic number.

7975878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7975878 is a wasteful number, since it uses less digits than its factorization.

7975878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329318.

The product of its digits is 987840, while the sum is 51.

The square root of 7975878 is about 2824.1596980341. The cubic root of 7975878 is about 199.7987809557.

It can be divided in two parts, 79 and 75878, that added together give a palindrome (75957).

The spelling of 7975878 in words is "seven million, nine hundred seventy-five thousand, eight hundred seventy-eight".