7880138 has 32 divisors (see below), whose sum is σ = 14204928. Its totient is φ = 3207600.

The previous prime is 7880123. The next prime is 7880143. The reversal of 7880138 is 8310887.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 7880098 and 7880107.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28943 + ... + 29213.

It is an arithmetic number, because the mean of its divisors is an integer number (443904).

Almost surely, 2^7880138 is an apocalyptic number.

7880138 is a deficient number, since it is larger than the sum of its proper divisors (6324790).

7880138 is a wasteful number, since it uses less digits than its factorization.

7880138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 7880138 is about 2807.1583496483. The cubic root of 7880138 is about 198.9961195509.

The spelling of 7880138 in words is "seven million, eight hundred eighty thousand, one hundred thirty-eight".