7123878 has 24 divisors (see below), whose sum is σ = 15543216. Its totient is φ = 2358000.

The previous prime is 7123877. The next prime is 7123891. The reversal of 7123878 is 8783217.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7123877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1408 + ... + 4028.

It is an arithmetic number, because the mean of its divisors is an integer number (647634).

Almost surely, 2^7123878 is an apocalyptic number.

7123878 is an abundant number, since it is smaller than the sum of its proper divisors (8419338).

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

7123878 is a wasteful number, since it uses less digits than its factorization.

7123878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780 (or 2777 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 7123878 is about 2669.0593848770. The cubic root of 7123878 is about 192.4149554061.

It can be divided in two parts, 7123 and 878, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 7123878 in words is "seven million, one hundred twenty-three thousand, eight hundred seventy-eight".