7287878 has 8 divisors (see below), whose sum is σ = 11772768. Its totient is φ = 3363624.

The previous prime is 7287859. The next prime is 7287899. The reversal of 7287878 is 8787827.

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

It is a super-2 number, since 2×7287878² = 106226331485768, which contains 22 as substring.

7287878 is a modest number, since divided by 7878 gives 728 as remainder.

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, 140126 + ... + 140177.

It is an arithmetic number, because the mean of its divisors is an integer number (1471596).

Almost surely, 2^7287878 is an apocalyptic number.

7287878 is a deficient number, since it is larger than the sum of its proper divisors (4484890).

7287878 is a wasteful number, since it uses less digits than its factorization.

7287878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280318.

The product of its digits is 351232, while the sum is 47.

The square root of 7287878 is about 2699.6070084366. The cubic root of 7287878 is about 193.8803066540.

The spelling of 7287878 in words is "seven million, two hundred eighty-seven thousand, eight hundred seventy-eight".